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", ...

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 ...