Used for 16 gauge sheet metal, good. It's not Milwaukee, but it's not $70 either. So expect accordingly. I have no complaints about the hole punching, I've been using them 5 days a week for 2 months and they're starting to dull. But hey, it's cheap
Pros
1) 3 SAE standard step drill bits allow 28 different size holes to be drilled in different thickness materials. A six-step drill bit from 3/16" to 1/2", a nine-step drill bit from 1/4" to 3/4" and a 13-step drill bit from 1/8" to 1/2" ( For detailed hole size and drilling depth of each drill please refer to product description below)