If you want to create perfectly round holes in wood, metal, or plastic, you’re going to need a hole saw. These cylindrical saws are powered by any corded or cordless drill, and their hollow shape ...

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", ...

"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." If you want to create perfectly round holes in wood, metal, or plastic, you’re going to need a hole saw.

You'll get the best results when drilling ceramic, porcelain, or concrete with a masonry bit tipped with carbide or diamond. A carbide bit will be slower going than diamond. You can also use a ...