1500W Induction Bolt Heater Tool with 8 Coils, 110V

4.5 stars. Half-star off only for the less common oversized vertical grip with handguard, which makes squeezing this in between suspension and other under-car components or inside an engine bay somewhat more challenging. Instructions state to use a cloth covered heating element loop that is approximately .2" (just under a quarter-inch) wider around (for the "I.D." = inside dimension) then the nut you are trying to loosen, for example. For a 5/16" threaded nut with 1/2" side-to-side width wrench flats, that translates to an approximatley 1" diameter loop (or just a bit smaller). (2 ea of 3 different size heating element loops are included in this kit - kits with varied sizing and shapes are widely available on Amz and the 'bay, etc) I first tried the medium sized loop (1-1/16" ID) around the approx 1/2" (wrench-flat-to-wrench-flat) diameter / O.D. nut, elevated on top of a slightly larger nut (to center the upper nut evenly within the heating element loop). I achieved the following "hottest point temp" results using a thermal imaging camera (see photos): At 15 seconds: 570 deg f. At 30 seconds: 850 deg f. At 45 seconds: 920 deg f. At 1 minute: over 1000 deg f. (my thermal imager "tops out" at a maximum of 1076 degrees f.) The instructions recommend a heating limit of from 572-932 degrees f. to loosen stuck / rusted nuts. This matches suggestions found online recommending temperatures of from 400-600 degrees f. to loosen stuck or rusted nuts. I reached the recommended (per the manual) 570-932 degree temp ranges in from 15-45 seconds using a slightly larger loop diameter than recommended in the instructions (by just + ~ 1/16th" ID or so than the recommended .2" gap around the nut). The manual also states that while a "visible dark red color" indicates that the the external temperature is at around 1022 degrees, the "metal surface temp" will be about 122 degrees lower, but that temperatures over 1022 degrees could start to anneal (soften) hardened metals, and so again recommends keeping heated nuts and other metal components to under 932 degrees f. Other online sources point to a recommended limitation of no more than 750–1100°F for typical low-to-medium carbon hardware, typical of the big box stores (for lower, consumer grades of hardware). So it seems there is a strong, pursuasive argument not to "ride" the trigger for more than 15-30 / 45 seconds, using the examples described above (of an approx 1/2" diameter nut, limited to between 700-932 degrees maximum, depending on the source). Achieving a cherry red color on every nut one might want to use this on may not be the best practice, particularly if the threaded bolt the nut is attached to is going to be re-used and torqued to spec. Using the smallest heating element loop size in the kit, which is approximately 5/8" across the inside diameter (I.D.), and only has about ~ 1/16" additional gap around the circumference of the example nut being used (which is approx 1/2" across), the nut heated up to over 1000 degrees in a blazing 15-20 seconds, much faster than with the wider / "looser" fitting loop. Clearly, using an overly "tight" fitting heating loop takes some finesse without risking annealing the hardware. When first plugged in, the tool's fan runs constantly, blowing air directly out the front of the tool on to the heating element loop, as well as cooling the tool internally. The heating element itself does not start to warm up until the trigger is pulled, which also turns on a small white led light in the front of the tool that helps illuminate the target hardware and provides a visible confirmation that the heating element is warming up. Once the trigger is released, the heating element loop cools off to near room temp in just a minute or two (thanks to the running fan). The case is decent, has a hinged lid, and has a fair amount of room for what is included in the kit. The case measures 16-5/8" wide, 11-1/2" deep, and 4-3/8" high. The tool isn't packed too tightly in the case. The tool is solid, weighing more than any hair dryer, but right in line with typical plug-in heat guns (eg, Dewalt heat gun). The cord is solid, 300/500v rated, and is a generous 57" in length. I do, though, feel obligated to mention that there is no UL rating label in the manual, on the tool, or in on the box. Lastly, worth mentioning is that the tool will not fit inside the case with the two heating element clamp nuts/knobs attached. They must be un-screwed from the tool in order for the tool case lid to be closed. I feel fairly confident some sort of "after-market" / replacement locking knob could be found that is more "low profile" and would fit inside the case without having to remove the knobs. The threaded portion of the locking knobs are 7/8" in length, and are M8x1.25 thread pitch, if attempting to locate a "low profile" option. EDIT: I ordered three different replacement locking knobs to try out in place of the oversized knobs that come with this induction heater. All three fit perfectly, secured the heating elements well, and also fit inside the tool case when the lid was fully closed: M8 x 1.25mm thread (x 20mm length) Thumb Screw T Bolts; Amazon ASIN: B0DPH95J3P (copy, paste and enter this search term in the search box on Amazon). M8 - 1.25 (x 20mm length) Metric Flange Hex Cap Bolt; uses 13mm hex head (wrench or socket); Amazon ASIN: B0F3VRR6P5 M8 x 1.25mm thread (x 20mm length) Knurled Thumb Screws, 25mm / 1" knob head; Amazon ASIN: B0FC6GDQWD (although currently not showing this exact configuration as available among the 50 or so size options. 10, 15, 25, & 30mm lengths are listed, but not 20mm, although it may be "back in stock" at some point). I'm not sure the 25mm version would still fit in the storage case and allow the lid to close. YMMV. I also purchased a set of "perpendicular" aligned replacement heating elements, which are turned 90 degrees from the "horizontally" aligned elements that come with this kit, just to provide "options" within tight spaces. Not inexpensive to add on, and there may easily be less expensive accessory heating element kit options out there, but fairly priced for what they are: Magnetic Induction Heater Coil Kit - 8PCS, Amazon ASIN: B0CJ2XCR43 I have no affiliation whatsoever with any of the four products listed above. I simply found them to work well with this induction heater kit, and they offered more flexibility and usablity than the original kit offered. I am sure the same or similar locking knobs or heating elements can be found through a vast number of online sources. All in all, I feel this is a very good value for all but the more demanding professional end user. Time will tell as far as actual durability. At less than 40% of the cost of the "U.S. mfg" option (and often on sale), it is a serious option. Note: I was not compensated for this review. I purchased this induction heater tool with my own funds and for my own personal use. While I was an Amazon VINE reviewer participant several years ago, I am no longer involved in that program.

I bought this after 6 months of struggling to remove various rusted nuts and bolts from my 2002 Landcruiser that I'm in the process of restoring after years of brutal winters and salt corrosion from northeast winters. I only wish i had discovered this sooner. I had been using a propane torch to heat up the rusted bolts, but there are plenty of areas that are simply not amenable to a flame (near gas lines, rubber bushings, plastic components, etc). I never even knew such a tool existed until 2 weeks ago! I opted for this more expensive higher wattage induction unit, but it has been worth every penny. There is no heat conducted to any non-metal part and no spread beyond the immediate area being heated. It's truly amazing. It heats up a nut in 30-60 seconds and has an instant effect. I've been using it for a week now and it has held up extremely well. I've now also used it successfully on a 2nd car to replace seized bolts on 2010 Volvo lower control arm/ball joint and it was a breeze to remove them after 30 seconds of heating with this. Would highly recommend this to anyone needing to do similar automotive work, and retire the propane torch for good!

I’ve used torches, breaker bars, and every trick in the book, but this induction bolt heater changed the game. It heats metal fasteners in seconds without flame—perfect for working around fuel lines, plastic, or wiring. I used it on some rusted exhaust bolts and they broke loose like butter. The kit came with several coils, and swapping them out is easy. The tool itself feels solid and heats up quickly. Just be ready—it gets hot. If you're in automotive repair or heavy equipment maintenance, this is absolutely worth the investment. Way safer and more precise than a torch. Highly recommend for anyone tired of snapped bolts and stripped heads!

I bought this rather expensive product to help with restoring my VERY RUSTY truck. I am very pleased with the performance and capability of how it can convert the rust into dust and release the stuck bolts from my rusty truck frame. These bolts had been in the wet for 23 years on salty roads, so there are no worse conditions to challenge this equipment. Some of the bolts were snapped off in the hole with two layers of 1/8" steel plate with a nut welded inside the second layer and that nut was rusted on to the snapped off bolt! Add to that a tight and limited access due to being inside the rear leaf spring arch, and near the gas tank, so this tool is a MUST HAVE for anyone trying not to blow themselves up with an open flame near the gas tank or burn some vital wiring or plastic parts. The tool will turn any exposed bolts red hot in about 30 seconds which softens the rust like magic. You may still need to weld a nut on the exposed end of the snapped off bolt to get a grip on what's available, and for that, I would recommend a MIG welder with some .035" wire to get a good bite for the nut to twist the stub out of the hole. The kit is furnished with two extra-long wire electrodes that can be bent into any needed shape for best access, and I have used them both! I would not have a chance of making any progress on this rusty truck without this induction heater at 1500 watts- packs quite a punch! Nice padded carrying case and very simple to use! Just DO IT!

I wish that this was a little cheaper because I don't believe I will use it as much as other things but it did save me money from not having to take it to the shop! It does a great job heating bolts.. I have got to come up with other uses for it though.. lol

Should have bought this years ago!!! Gets stubborn bolts/nuts loose without stripping or breaking the head off. This thing is worth it's weight in gold.

All mechanics should have this. For years I have been using the torch to heat up stubborn nuts and bolts but this is a game changer! Easy to use and quickly and safely will heat up a fastener in seconds. Highly recommended!

These are a must have in the rust belt. They get an exhaust manifold nut cherry red in about 30-45 seconds without heating up anything around it. Keep in mind the metal has to be ferrus in order to work. It won't heat aluminum as it works through induction and magnetism. Would 100% recommend.

コイル線が以外に太くてM6だと1巻半くらいしか掛からないかな😅 ナットが赤くなる前に被覆が焦げそう💦 それでも熱で変色するくらいで回せましたね😅

Highly recommend for any DIY mechanic. I spent hours trying to remove rusty endlinks and ended up giving up. I even used a torch and it wouldn't get the bolt hot enough to remove. Then I found this induction tool and I kid you not, I got the bolt out in less than 5 minutes. Highly highly recommend.

It takes about 45 seconds to heat up a 14mm exhaust nut or 17 mm end link but, but it definitely gets it red hot. Has helped me on removing exhaust pipes, auto suspension and even seized wiper arm. This gun induction tool replaced my previous wand induction tool, this one is much better bc the fan is always on. My previous wand one from a different brand, would overheat after about 1.5 minutes of usage bc the fan would only come on when the button was pressed. I work at an auto dealership and I would recommend this induction tool over many others sold on Amazon.

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A most have if you live in the rust belt and a DIYer...Use it 4-5 times since i bought it this thing haven't fail me yet. Better control of heat in tight spaces where rubber bushings and wires are located. Would have gotten 5 Star if it wasn't for the prices. Will update on durability later, Maybe then I'll give 5 stars!