Review on IRWIN Tools 3018004 Black Oxide by Dewitt Graham

These drills stayed sharp when repeatedly tapped into mild steel. The best beats I've had in a long time. The unbreakable, titanium-coated scrap china that everyone sells. CRC makes an aerosol can of coolant that sticks to drill bits, which I think works well. The steel and rubber body is very good. The only complaint I have is that small parts sometimes fall out of the case and interfere with the movement of the lid. I reviewed this a while back and in case anyone is interested, I have a cheap solution to small parts falling out. Attach tape to the 1/2 inch metal tab sticking out at the bottom of the box. Glue it to one side of the back, allow it to extend 1/2 inch past the top of the back, fold over and glue to the other side of the back. I've made two coats to be tougher and so far it's working for me.