Review on Optimized Hardness 💎 Polishing for Kwokker Tungsten Machining by James Dominick

I found the need to use them the day after receipt by sanding some epoxy (NOT STEEL) onto ABS plastic. It cuts well until the drill grabs the corner of the epoxy and the head is cut off immediately. I wasn't too aggressive with my cutting and my Dremel tool only ran at 1/3 speed. These things are NOT solid steel! WAY too fragile. DO NOT BUY !