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 ...

There are three tool options to consider when drilling large-diameter holes in thick steel: twist drill bits, hole saws and ... cutters are considered to be industrial-grade tools.

Drill bits can be sharpened by hand or with a bench grinder, but the best method is using a dedicated ... TCT drill bits need ...