Review on 🔧 Irwin Industrial Tools 10502CB 3 Piece: The Ultimate Power Tools Set for Professional Use by Bill Dahl

Excellent for steel. I've spent a decent amount of money on other step drill bits including Milwaukee Impact, HF Titanium, Klein Black Oxide, etc. I use them to drill steel up to 3/16" thick. They cut quickly with a hand drill with minimal oil (horizontal position) and do so without blunting for now. I wish I'd bought them in the first place.