Cobalt and carbide drill bits are both good for drilling through metal. Carbide bits are more durable, though, and can drill ...

We may earn revenue from the products available on this page and participate in affiliate programs. Learn More › Home improvement centers often dedicate an entire aisle to drill bits, which come in a ...

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", ...

HOUSTON — To hear the people at Baker Hughes tell it, a drill string — length after length of narrow pipe that can extend for miles into the earth — is far from a rigid assembly of high-strength steel ...