Twist drill bits. Especially in steel thicker than ... when trying to use a hand-held drill in an awkward location. 2. Carbide-tipped hole saws. With adequate lubrication in a drill press, carbide ...

Masonry drill bits are good for surfaces like concrete, brick or mortar. They're normally twist bits with a carbide fin at their point. The fin breaks up the masonry, while the flutes on the body ...