"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.

Hargreaves explains the best way to use a hole saw. “Slow the drill as the diameter increases, keep the saw square, and clear dust regularly to avoid burning.” He adds, “Tape the face, clamp a backer, ...