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 ...

Twist drill bits. Especially in steel thicker than ¼", twist drill bits ... carbide-tipped hole saws can drill through metal that is up to 5/8" thick. Though it’s possible to use a hole saw ...

The least expensive twist bits are made of high-speed steel (HSS), and these basic bits are just fine for most metal-drilling tasks. If you’ll be drilling a lot of holes or need to drill through ...

People have been working metal for so long that the list of ... especially one as simple as putting a hardened edge on mild steel using a drill bit as a filler rod. This tip comes to us by way ...

Forging, casting, and cutting are some methods of getting the metal ... the steel, and the results speak for themselves. With the liquid nitrogen treatments the bits were easily able to drill ...