Review on 🔧 Enhanced Precision and Convenience: Introducing the Premium Countersink Carrying Piece Tri Flat by Mike Campbell

These countersinks are great for mild steel. I ran them at 470 rpm and got clean mild steel countersinks every time. I used plenty of cutting fluid and maintained a good feed rate to make thin rolls of steel while the cutters cut into the workpiece. I'm more than impressed with the performance and the small metal storage case is a nice plus too. Great price for a great set.