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 ...

Harbor Freight has many drill accessories to make the job you're doing easier. Here are five of the top-rated drill bits to ...

Holes larger than an inch require a spade ... These are robust steel drill bits, good for drilling into wood, plastic or metal. One downside: At high drill speeds, they can overheat and soften ...

you can drill through most metals at 3,000 rpm. For larger twist bits (11/16 in. to 1 in.), 350 to 1,000 rpm is recommended. For clean, precise holes in thin sheet metal, make a wood sandwich.

Allows for a flat blind hole to be drill or larger diameter holes to be cut Wood Auger Has a wider twist than a normal drill. It has a screw shaped end point. Not as clean cut as a twist or flat bit.