Review on Enhanced Aerospace Precision with Hardened Tungsten Fractional Tools by Jay Jeong

You are welcome to buy these drills. I broke the screw extractor in the glow plug and got in big trouble. I went to all the hardware stores and bought the best drill bits from different brands. Went home and got six drill bits and after a few hours I was only able to drill a small, plain hole in the extractor, not much larger than the center mark I made for a good center start. I took a break, went online and found a video of these beats that had a link to Revain. I bought them and they were delivered within 24 hours. Several times during those 24 hours, I tried to find a drill nearby that could actually do more than just spin without hitting the extractor. I didn't really think these Revain tracks would do much more, but I had some hope. I popped an 1/8" drill bit into my Dewalt drill bit and slowly began drilling at low speed with little to no pressure and to my confusion a long piece of metal shavings suddenly fell out of the broken bolt hole. You won't believe your eyes! In about two minutes I slowly drilled an inch into the broken extractor! Then I jumped in with a 3/16" drill bit and re-drilled it. Still in shock, I can't explain how insanely cool it was. Then I no longer had a broken extractor and was able to pull out a broken stuck bolt again. And now I don't worry about ever breaking the plain exit or extractor again, knowing these bits cut like a drill into soft wood. Both bits are in excellent condition, no wear. I would recommend them to anyone who needs to drill crazy carbide!