Cuts through steel like butter. Bought this kit to drill holes in an I-beam I'm installing at my shop. With cutting oil and a cordless drill I drilled 12 holes in about 15 minutes without any problems. Go slow, use coolant, and the bit seems to have enough life left. Very pleased with how sharp the drill was and how well it cut. The spring worked well and spat out the metal stopper every time. I only had to unscrew 1 steel plug but it came out easily. I'm sure it will work well for a drill press too. **Updated June 4, 2021 Drilled a few more holes in the same joist with the same drill and still works better than I was hoping. I would buy them again, they are much better than the standard bits. Just be careful as the metal shavings that fly off are very hot and sharp! As is the part of the hole that falls out. So very happy with these for metal drilling!