Working with hard metals requires the best cobalt drill bits. We tested top picks to see which bits could bore through the toughest metals. Check out our reviews and discover which one came out on top ...

carbide-tipped hole saws can drill through metal that is up to 5/8" thick. Though it’s possible to use a hole saw with a hand-held drill to bore a hole larger than 2" in diameter, there’s a ...

It has a screw shaped end point. Not as clean cut as a twist or flat bit. It is used with a hand drill Wood Hole saw Comprised of a twist drill surrounded by a large circular tube with a saw teeth.