When welding, you must use protective equipment such as gloves if you work in the manufacturing company and come into contact with various industrial machinery on a regular schedule. Welding gloves are a must-have protection item that protects your hands from fire and sparks. Don’t forget to get a good pair of welding gloves while you’re shopping for safety equipment.

The top three best welding gloves for your welding needs are stated here. RAPICCA Leather Forge Welding Glove is a globally recognized brand that offers a wide range of hand safety options. The second is Caiman White Goatskin’s three-dimensional Kontour style, which was created to optimize fit and comfort, or Revco GM1611, which are both easy to wear for extended periods of time.

Welding can be dangerous, and there are many health hazards associated with this occupation. Our eyes can be damaged by UV and infrared radiation, our lungs can be damaged by gases, and our skin can be burned by radiation, flying sparks, spatter, and hot, sharp metal fragments.

The majority of them protect your hands and forearms from the hot sparks and high heat produced during the welding process. Since they are such an important tool that protects your hands from injury, you should choose them carefully.

These advanced gloves allow you to move your fingers freely and do not limit blood flow. They even shield your hands from infrared and ultraviolet radiation, as well as high heat and electrical shock. They also have improved grip and abrasion resistance, ensuring that the welding torch does not fall from your hands.

The length of the gloves is another consideration when selecting the best pair of gloves for you. Although most gloves are 13 to 16 inches long and only cover your lower forearm, you can opt for a pair that protects your elbows as well. Keep in mind that this thick leather is intolerable in the summer before opting for the long style.

We use our hands for more than just welding; we use them for a number of other tasks as well, which is why proper protection is so important.

Best Welding Gloves | Top 10 Welding Gloves We Have Tested

The welding process is most strongly aligned with your hands. Welding results in a lot of spattering, molten metal, and toxic radiation levels. Welding gloves that aren’t the right fit can cause severe burns and other injuries.

Welding processes such as MIG and stick both disperse spatter. Spatter can burn through any kind of cloth, including thin leather. As a result, these gloves should be made of thick split leather to prevent spatter from burning through and touching the hands.

Thin welding gloves, for example, are much better suited for TIG welding – we have a dedicated TIG welding gloves guide here. Solid security without sacrificing dexterity is needed for MIG and Stick. Following is the list of top 10 welding gloves we have tested.

#PreviewProductRating
1RAPICCA Leather Forge/Mig/Stick Welding Gloves
2RAPICCA Leather Forge Welding Gloves
3WZQH Leather Forge Welding Gloves
4Lincoln Electric Traditional MIG/Stick Welding Gloves
5Drake Off Road Tools 400 Welding Gloves Lined Leather
6Caiman White Goatskin, Long Cuff, Welding-Tig/Mig Glove
7KIM YUAN Extreme Heat/Fire Resistant Gloves
8Revco GM1611 Top Grain Leather Cowhide MIG Welding Gloves
9John Tillman and Co Gold and Pearl Fleece Lined MIG Welders Gloves
10Steiner 21923-L Welding Gloves

Best Welding Gloves Reviews

When it comes to heavy-duty mechanical work, nothing is more important than safety. Welding is no exception to the rule that wearing the proper equipment for the job will mean the difference between life and death. Welding gloves are the only thing that stands between you and a flame that burns at 3,500°C (6,332°F).

These advanced gloves allow you to move your fingers freely and do not limit blood flow. They even shield your hands from infrared and ultraviolet radiation, as well as high heat and electrical shock. They also have improved grip and abrasion resistance, ensuring that the welding torch does not fall from your hands.

However, since stick welders produce the most heat compared to other welding methods, the gloves must be extra thick.

1-RAPICCA Welding Gloves

These RAPICCA gloves have been treated to resist oil and fire, and they provide the highest level of heat protection. They’re a lot longer and have two layers of leather to give you extra coverage when you need them. They’re also gentle on the skin and can be used for Stick welding, MIG welding, Flux-core welding, forging, and other high-temperature applications.

RAPICCA Welding Gloves
4.5 out of 5.0 stars

The gloves have 16-inch long sleeves to keep your hands and forearms safe from open flames or fire sparks. However, the gloves should not be used in close contact with hot cookware or grill grates for an extended period of time.

To provide improved grip and extreme heat safety, RAPICCA gloves are sewn with Kevlar stitching and double reinforced padding on all five fingers. For added protection and to avoid tears, the elbows are often padded. Padding is also extended on the back of the gloves to shield them from flames and spatter while also providing intense heat resistance.

Four-layer heat resistance: These gloves have four layers of heat resistance and can withstand temperatures of up to 932 degrees Fahrenheit. The double Kevlar padding is used in the first layer (outer layer), while the intermediate layer is made of high-temperature-resistant aluminum foil and flame-resistant cotton fabric. For excellent heat resistance and sweat absorbency, the inner lining is made of 100% cotton with flame retardant thread stitching.

RAPICAA is crafted from 1.5mm split natural cowhide leather that is heat resistant, cut resistant, wear resistant, and oil resistant. The gloves are used as standard MIG and Stick welding gloves, barbeque gloves, and wood stove gloves for extreme heat protection, and they provide optimum protection even in extreme conditions.

Pros
  • Leather construction with two layers of reinforcement
  • Superior convenience
  • Immune to cuts and punctures
  • Stitching made of Kevlar is more durable.
  • Heat resistance is excellent
Cons
  • The majority of users expressed dissatisfaction with the stitching.
  • Ideal for activities with a short duration.

The best thing about this product

Direct interaction with extremely hot surfaces should be limited to around 15 seconds.


2-RAPICCA Leather Forge Welding Gloves

A full leather outer coat protects the Rapicca Leather Forge Welding Gloves. With a 7.5-inch sleeve length, the maximum glove length is 16 inches. Rapicca uses heavy, smooth, and flexible shoulder split cowhide to make these gloves that are both thick and flexible. They’ve been treated to withstand heat, oil, and fire.

RAPICCA Leather Forge Welding Gloves
4.5 out of 5.0 stars

Rapicca Leather Forge are the best Welding Gloves that  have double-layered Kevlar sheeting and aluminum insulation to cover the fingers, and Rapicca Leather Forge Welding Gloves have additional high-temperature protection. Some consumers, however, complained that the heat safety wasn’t consistent in the glove. Rapicca advertises a high-degree Fahrenheit temperature ranking.

That’s probably higher than you’d like to try them for the first time, at the very least.

The palms and backs of the Rapicca Leather Forge Welding Gloves are also shielded. With Kevlar stitching, they’re designed to last. Rappica used a full cotton filler on the inside of these gloves. When removing the gloves, some users have reported that the lining has turned inside-out. That may be a problem at work. The Kevlar sheeting also provides extra puncture, tear, and cut resistance.

Pros
  • Temperature is set to a high level.
  • Cotton lining is soft and comfortable.
  • Kevlar padding with two layers
  • Fingers shielded
  • Resistance to abrasion and cuts
Cons
  • It’s possible that the inner liner will come loose.
  • There have been reports of inadequate heat protection.

The best about this product

RAPICCA welding gloves are the only ones on the market with Double Reinforced Kevlar Layer Padding on all Fingers, Palms, Elbows, and Backs. This outstanding design makes RAPICCA welding gloves the most severe heat-resistant gloves on the market.


3-WZQH Leather Forge Welding Gloves

WZQH is a well-known brand that excels at offering useful hand security gloves to help welders overcome long-term challenges. The stitching on these leather forge gloves is extremely powerful, and the stitching is not visible from the outside. They are one of the best welding and multi-function gloves on the market today because they do not crack easily and are more durable.

WZQH Leather Forge Welding Gloves
4.5 out of 5.0 stars

All vital sections of the WZQH are double-stitched, and they are designed to be heat-resistant, sturdy, and versatile. A double Gunn cut is used on the fingers to increase their strength and durability. Furthermore, the inner lining is made entirely of soft cotton for all-day comfort, moisture management, and effects protection.

The gloves are made of cowhide split leather that has been insulated with high-quality aluminum foil to provide superior heat resistance, flame resistance, cut and puncture resistance, and cut and puncture resistance. The gloves protect against heat up to 932 degrees Fahrenheit (500 degrees Celsius), and they’re great for welding, baking, grilling, training pets, gardening, and more.

WZQH is available in a one-size-fits-all design that is suitable for both men and women in any environment. The gloves are genuine cowhide, as said, but they should not be submerged in water. When they get dirty, wipe them down with water or a brush and let them air dry.

Pros
  • Extreme temperatures won’t hurt the gloves.
  • Long-lasting
  • It gives you the most freedom.
  • Great fit and high sweat absorption.
Cons
  • Really large.
  • It would be wonderful if they were available in different sizes; one size does not suit everything.

The best thing about the product

These gloves perform superbly, whether used for welding or some other outdoor work that requires gloves that are as comfortable as welding gloves.


4-Lincoln Electric Welding Gloves

The Lincoln Electric K2979 is an all-purpose protective glove that can be used in any advanced fabrication environment. The Kevlar stitching ensures optimum strength thus preventing heat or fire from reaching your hands. They’re also very comfortable and versatile, and they’re designed to have a consistent fit, feature, and quality.

Lincoln Electric Welding Gloves
4.5 out of 5.0 stars

Lincoln Electric K2979 is recommended for MIG, Stick welding, and other dangerous conditions since its architecture has been tested and proven to last in any fabrication setting. To make sure that they do not break or rip easily, they are stitched with high-strength Kevlar.

High-wear areas, such as the thumb, are also lined to extend the glove’s existence.

To provide heat resistance and protect the hands and forearms from sparks and fire, the outer layer is entirely made of leather. The leather is durable and the gloves can withstand everyday exposure to heat in terms of heat protection. Furthermore, the red flame pattern adds charm to your outfit and is simple to pair with your welding jacket or welding helmet.

A full cotton liner is used in the glove’s inner layer to provide heat resistance and added comfort. The cotton twill also absorbs moisture, making it more comfortable to wear. The quality is excellent, and they perform as expected while maintaining a consistent fit and function. The best thing is that they are extremely soft and durable, allowing you to wear them for longer periods of time.

Which seam of these gloves is strengthened with a welt, which is a piece of leather sewn into the seam to improve and increase longevity, in addition to the sturdy leather construction. Furthermore, unlike other welding gloves, they are not overly bulky, and one can weld all day in them without feeling the heat.

Pros
  • Leather gloves for a variety of uses
  • Heat tolerance is exceptional.
  • Fit that is consistent
  • Excellent long-term longevity
  • It appears to be cool.
Cons
  • One size is just Stiff at first, but once broken in, they become very comfortable.

The best thing about this product

These gloves have a nice feel to them and are suitable for any form of welding.


5-Drake Welding Gloves

This is another high-quality glove on the market. Welders who want to work harder at a higher temperature will find this tool useful. To keep your hands clean, you can easily resist the flans, splatters, and sparks. It measures about 14 inches long and is slightly smaller than most gloves. This is another high-quality glove on the market. Welders who want to work harder at a higher temperature will find this tool useful. To keep your hands clean, you can easily resist the flans, splatters, and sparks.

Drake Welding Gloves
4.5 out of 5.0 stars

It measures about 14 inches long and is slightly smaller than most gloves. The US forge gloves are extremely convenient to wear when welding. It’s a low-cost glove that’s also easy to use. Its Kevlar stitching is particularly effective at resisting heated plasma. It is currently one of the most adaptable gloves available. Its adaptability will inspire you and you will be able to complete your tasks quickly.

Pros
  • working conditions are adaptable
  • It is very inexpensive and offers high-quality service. It is extremely heat resistant and has locked stitching to add strength.
Cons
  • Larger sizes are not available.

The best thing about this product

If you’re looking for tiny gloves, US Forge is the company to go with. As a result, you should bring a pair of welding gloves with you.


6-Caiman White Goatskin Welding Gloves

Caiman 1600 White Goatskin TIG is the best welding gloves that is made for TIG welding and are affordable and relatively durable for shop use. That means you shouldn’t use them for hard work of any kind and should limit your use to welding only. This isn’t a criticism of the glove; it’s just a fact of life for many welding gloves.

Caiman White Goatskin Welding Gloves
4.5 out of 5.0 stars

TIG needs that same level of dexterity and feel. By definition, any glove that is thin enough to provide the feel you need while still being supple enough to allow you to manipulate the torch and rod isn’t ideal for re-stacking metal inventory.

Usually, since this pair of gloves is so cheap, you can buy a second pair for hard work and keep them on hand. These Caiman 1600 goatskin gloves will serve their function admirably. Bad stitching has been recorded by some users, as well as a seam running down the middle of the index finger. This seam can interfere with your ability to feel the welding process.

Caiman’s white goatskin gloves are made of extremely durable goat grain leather, as their name suggests. That material is used in the fingers and palms of the gloves. These gloves have a 4” cuff made from a different hide of long split leather from the wrist onward.

It’s a pretty good combination of durable material and wrist safety.

Pros
  • Cuffs made of split leather that are long and wide.
  • Cut-resistant
  • Excellent quality construction at a reasonable price
Cons
  • Hot touches are not recommended.
  • In the pit of the index finger, there is a seam.

The best thing about this product

High cuffs are excellent for securing your forearm, and their price is difficult to beat.


7-KIM YUAN Extreme Heat/Fire Resistant Gloves

If you’re looking for the right heat protection, take a look at these tough welding gloves from Kim Yuan. They’re made of high-quality cow split leather that’ll keep you cool in the summer. They’re basically fireproof, so you can work with hot metals with them.

KIM YUAN Extreme Heat/Fire Resistant Gloves
4.5 out of 5.0 stars

Sweat absorption is an excellent feature to have when wearing these welding gloves. Your hands can naturally get very hot after several hours of welding. These gloves, on the other hand, are cotton-lined to retain sweat and keep your hands comfortable and dry.

You won’t have to worry about being burned because these gloves can withstand temperatures up to 662 degrees Fahrenheit. Furthermore, they have Kevlar stitching, which ensures that the welding gloves retain their consistency even when exposed to extreme temperatures.

They’re incredibly thick but soft, making them easy to wear all day. They’re also oil-resistant, but not thick enough to withstand punctures. Because of the pads, hand strain is reduced. They have the necessary cushioning to avoid injury and pain. They often have a secure grip when working with hot or heavy items.

The denim cuffs give you more wrist flexibility so you can shift your string. These gloves, on the other hand, are too rigid for TIG welding, where you need your hands to move freely for more precise and thorough tasks. In addition, they are more expensive than other variants on the market.

The gloves are made of Kevlar thread, which makes them more heat resistant than other heat resistant gloves and less likely to break, making them ideal for high-temperature work. Hands are cushioned by a reinforced palm when dealing with large or sharp items. Excellent efficiency when it comes to heavy-duty welding and gripping hot objects like stoves and cookware, as well as coal or firewood.

These gloves are made from cow parts that are not only dense but also soft and flexible, with high heat/fire resistance, puncture resistance, cut resistance, and mild oil resistance. As a result, it will help you function more efficiently.

Pros
  • Cow split leather gloves are tough and long-lasting.
  • Padding is provided by padded patches.
  • Denim cuffs that are heat and fire-resistant for added comfort
Cons
  • Oil and cut resistance aren’t great.
  • TIG welding is too difficult for you because you’re too rigid.

The best thing about this product

Have a broad range of applications, decent quality, or a large number of features.


8-Revco Welding Gloves

The palms and backs of the Revco GM1611 Black Stallion MIG Welding Gloves are made of heavy, flexible cowhide. They have wide cowhide leather cuffs and are 12 inches long. The feel of these gloves is praised by users, with many praising the cotton liner. Others praised the design’s superior “touch,” with many claiming to use the same gloves for TIG work.

Revco Welding Gloves
4.5 out of 5.0 stars

The Revco GM1611 gloves have a full cotton lining on the inside, making them comfortable to wear for long periods of time. The smooth index finger and signature Black Stallion reinforcing patches on these gloves are popular with owners.

Revco refers to the reinforcement on the glove’s heel as a drug patch, while the extra strengthening leather on the back of the cuff is referred to as a rest patch.

Every seam on the Revco gloves is stitched with Kevlar for optimum durability in the high-temperature, high-impact environment provided by welding processes. The robust structure and fit of these gloves are praised by owners. They have a good grip on the fingertips and the seams stay put. While some users wish they were longer, they serve their purpose.

Mig welding gloves with a seamless index finger and a light cotton lining not bulky. The palm is made of grain cowhide leather, and the back is made of split cowhide leather.

Patches of reinforcement where you need it most: the palm, thumb, and index finger. For optimum durability and resistance to fire, sparks, and slag, Kevlar is stitched throughout.

Pros
  • Good dexterity when it comes to handling heat
  • Fits well oversleeves and is very adaptable.
Cons
  • Fingers are more prone to wear than other parts of the body.
  • The sizes are tiny.

The best thing about this product

It is comfortable for the whole day, and fabrics remain together and they wear well at the wrist.


9-John Tillman & Co 50L Welders Gloves

John Tillman and Co 50L are one of the best MIG welding gloves available, as they are durable, provide excellent protection, and are extremely comfortable to wear.

The gloves are made of high-quality cowhide leather with broken cowhide reinforcements on the palm and back. All of this contributes to the gloves’ extreme durability and safety. The Kevlar thread also stops the stitching from spontaneously combusting, and the 4-inch cuff provides additional forearm protection.

John Tillman and Co 50L Welders Gloves
4.5 out of 5.0 stars

Working in these gloves is more convenient thanks to the fleece lining and smooth forefinger style. Another characteristic of this model that sets it apart from other welding gloves is the elastic back of the gloves. It ensures a more comfortable fit and makes working in them safer.

Tillman Large Top Grain Leather MIG Gloves With Split Leather Palm Reinforcements, Split Leather Back, Fleece Lining, Seamless Forefinger, And Elastic Back (Carded) Broken cowhide back with elastic for the optimum fit. Fleece-lined for extra warmth and protection in hot or cold weather without adding weight. For the best feel, use a seamless forefinger.

Pros
  • The fit is really good.
  • Good heat resistance.
  • There are several reinforcements.
  • Excellent dexterity.
  • Affordable price.
Cons
  • This product is not intended for overhead welding.
  • Cotton padding has a tendency to fall out.

The best things this product

The sleeves are specially treated and tanned for increased heat resistance.


10-Steiner Welding Gloves

These Steiner welding leather gloves will cover your entire forearms and about half of your biceps with their 23-inch length. While I think this is a bit excessive, some people prefer extreme security and are unconcerned about getting too hot in leather.

Steiner Welding Gloves
4.5 out of 5.0 stars

These are the best welding gloves, unlike the Caimans, are made of split cowhide, which makes them thicker yet

smoother. Despite the fact that these gloves have a very simple design, they perform admirably. Since the leather is soft, it is also very flexible, allowing you to move your hands and arms easily.

It around the palm, there’s a reinforcing leather patch to improve the resilience of a position that’s prone to ripping. To make the gloves last longer, all of the seams are lined with high-grade leather. Foam under the leather on the backside of the hand provides protection, and the entire glove is lined with breathable cotton for added comfort.

Some welders, however, have stated that stitches split after a few weeks. Since the thread is not made of Kevlar, it will be damaged by repeated exposure to heat and sparks. And even if just a few stitches on your hand rip, you’ll have to discard the whole glove.

Pros
  • Complete arm protection
  • soft and comfortable
  • backside with insulating foam.
Cons
  • The stitching is not made of Kevlar; it is one size fits all, and it is too hot for summer.

The best thing about this product

These gloves are useful for long periods of welding because they shield the user from welding sparks and splatter.

Also Check : Best Multi-Pross welder.


Buying Guide

Without a doubt, the product reviews are extremely useful, providing every reader with a wide variety of best welding gloves to choose from. However, bear in mind that there are a few more factors to remember when purchasing such protective equipment. Aside from stick welding gloves, there are also gloves designed specifically for TIG and MIG welding.

Based on Processes Welding Gloves

There are alot if welding gloves that can be used for a variety of tasks. However, some TIG welding gloves are not suitable for stick welding, and some MIG welding gloves may be too rigid to meet the demands and specifications of a TIG welding operation.

Fabrics

Despite the fact that the glove is made of leather, the stitching isn’t. As a result, the stitching is normally made of kevlar or a similar heat-resistant fabric. Also with durable fibers like Kevlar, the stitching on a glove is the first thing to tear.

Coating

Cotton, wool, and fleece are the most popular fabrics used for insulation. Cotton is very soft and increases mobility, but unlike wool, it is not a very strong heat insulator. Since fleece is made of polyester, it will cause your hands to sweat while retaining none of the moisture.

Sizes

It’s unfortunate that most welding gloves are “one size fits all.” And two men of the same height may have vastly different hand sizes. Since welding necessitates accuracy, you’ll want your gloves to be snug. If you have smaller hands, look for a product that allows you to customize the size.

Another size consideration when selecting gloves is the length of the cuffs. A standard 4-6″ cuff or a long one that covers your entire forearm are both options. Personally, I can’t stand long ones because they make me too sweaty. You can get away with shorter cuffs if you already have a welding jacket or just leather sleeves.

 flexibility

As I previously said, welding is an art form, and in order to create a better art piece, you must be able to move your hands more freely and precisely. As a result, the gloves must be soft and flexible.

Substance

To find the gloves that are right for you and your job, you must first learn about the materials that manufacturers use to produce them. Remember that costs aren’t as important as protection, so don’t be too concerned about saving money at the detriment of your safety.

It is acceptable to overspend in this situation because your safety is more important than your money.

Gloves are made from a variety of materials, both traditional and specialized. Cowhide, calfskin, pigskin, goatskin, buckskin, processed cotton, and wool are all examples of this material type.

Arm Protection

You’ll agree with me that welding without a face cover is impossible. Are you aware of the reasons? And does that have any meaning in terms of arm coverage? In this scenario, you must place a premium on arm safety.

The coverage is primarily intended to shield your arm from lightning and slag. UV rays from welding have a similar effect on the body as UV rays from the sun. As a result, arms covering can help to mitigate the impact.

However, you must also remember the sort of welding you want to do when selecting the best arm coverage.

Frequently Asked Questions

When it comes to welding gloves, how long do they last?

Your welding gloves will last anywhere from a few weeks to a few months, depending on how much time you actually spend welding. Your gloves can rip apart very easily if you wear them a lot and handle sharp objects all the time.

Skilled welders typically use pre-cut metal parts and only use their hands to weld, rather than picking and holding sharp edges. The gloves could last up to 3 or 4 months if done this way.

When it comes to welding gloves, what’s the difference between TIG and MIG?

MIG and stick are the best welding gloves, as previously stated, should be thicker and provide spatter protection. This also improves their ability to handle sharp metals.

TIG welding necessitates a higher level of dexterity in the hands. Thinner, smoother, leather-like goatskin is used as a result, but it will tear faster with heavy use.

Is it true that welding gloves are not electrically insulated?

Electrical insulation refers to the fact that leather welding gloves do not conduct electricity. They even shield you from UV and infrared radiation. Some have an aluminum lining to provide additional radiation protection.

What is the maximum temperature that welding gloves can withstand?

The majority of welding gloves can withstand temperatures between 500 and 1,000 degrees Fahrenheit.

Is heat resistance an important factor to think about when choosing gloves?

The heat-resistant glove is unquestionably the first line of defense for your welding operation, which ignores welding styles. Whatever welding method is used, heat is produced, which can cause harm ranging from minor to serious. As a result, heat resistance is a requirement.

How can I tell if the glove I’m considering buying would match my hand?

You must first determine the size of your hand before selecting a welding glove. To measure, begin at the highest point of the longest finger and work your way down to the wrist. Measure the width of your hand over the base of your knuckles on the palm side.

What is the best thumb design for me?

That has to do with what you will discover to be the most beneficial to you. According to the majority of users, Keystone or winged thumbs are the safest. These gloves are designed with comfort in mind. In comparison to straight thumb types, we’ve discovered that many people find it appealing.

When choosing gloves, should I consider dexterity?

Naturally, your gloves must have Dexterity for your safety when working. It’s equivalent to the welder’s assistance from the gloves.

Final Verdict

The best welding gloves are another piece of protective gear that protects your hands from fire and sparks. Don’t forget to get a good pair of welding gloves while you’re shopping for safety gear.

Here are the top 3 gloves RAPICCA Leather Forge Welding Gloves, Caiman White Goatskin, or Revco GM1611.

Welder gloves are available in a range of sizes, so you should have no trouble finding one that suits you from the list above. To properly grip the tools and rods, a good fit is necessary. When you wear all of your gear, including gloves, the excellent fit will make you feel at ease. Welding gloves, no matter how small or heavy, are a must-have.

You must use protective equipment if you work in the manufacturing industry and come into regular contact with various manufacturing machinery. Welding requires the use of safety gear such as gloves, helmets, and clothing.

There are many options, but the majority protect your hands and forearms from the hot sparks and high heat generated during the welding process. You should select your gloves carefully because they are such an effective tool for protecting your hands from injury.

Read More: Best Flux core welder.