Almost any general-purpose twist bit will do a decent job of drilling holes in metal. In fact, most drill bits labeled ...

There are three tool options to consider when drilling large-diameter holes in thick steel: twist drill bits, hole saws and annular cutters. 1. Twist drill bits. Especially in steel thicker than ¼", ...

We may receive a commission on purchases made from links. With a career spanning four decades in the aerospace industry, as a machinist, airframe structures installation mechanic, and technical skills ...