hole saws and annular cutters. 1. Twist drill bits. Especially in steel thicker than ¼", twist drill bits will require extra pressure, lots of lubrication for cooling and some profanity ...

Cut holes in steel quickly, precisely and safely. It is much more efficient than regular drill bits. Ideal for clean and burr-free cutting. 3/4" Weldon shank with 2 flats - fits most major brands ...