Tempil28347 Surface Temperature Indicator, One Indicator, 860 Degree F

I bought a couple of these, and they are completely useless. The idea is to wipe them onto something you're going to heat, then you can see when it melts. Well, there's no "wiping" to it. These things are hard as a rock and no matter how hard you rub them onto the object you're heating, none of it, other than perhaps some dust, comes off onto the object to be heated. I should have stuck to the paint-on liquid type. Either this design is terrible or the ones I got were all dried out.Also, the collet for holding the stick was frozen onto the metal tube that holds the stick, and was quite difficult to remove. Once I finally got it off, I could then see that the stick inside was also broken into several pieces. Useless junk, and it's going back.

It's so bad I'm not sure why this product is being sold. The marker is stuck inside the metal casing. The collet on the end that you need to loosen to extract the marker is jammed and won't turn. I destroyed the casing to get the marker out only to find out that it doesn't even mark aluminum. It's totally useless. I'm guessing they had a useable product at some point because they wouldn't have gotten very far with garbage like this.

Showed up with the cartridge broken like many others have reported but the chunks are still big enough to hold in the pen. The complaints of "too hard/dry" ...operator error. Just keep lightly swiping the work piece while you preheat until you get the wet streak instead of nothing. All there is to it. The 350deg stick tests accurate enough

Product was junk upon arrival, crayon just crumbles. Won’t melt at any temp, heated this brass to red hot and product just burned. Do not order from this vender!! Product is faulty and junk, absolutely a waste of money.

The chuck would not loosen and pen actually twisted / warped in my hand with the force I was having to apply (lefty loosy). Unusable

How does one actually use this? Not like a crayon, but more like compacted dust and close to useless.

Not as easy as I'd hoped for testing brass cases while annealing the necks.

Works as advertised, but the stick is so hard it doesn't stick well to anything. The higher temperature ones are even harder. Think I'll go with the liquid version next time even though it is more expensive.