Almost 5 stars. The chisel easily cut holes in 3/8" zinc plated steel brackets and 2" steel drawbars. I used a drill press and lots of oil. One of the two cutters had 2 small chips after drilling through 3/8" stock. As this is a cobalt bit I wasn't shocked but I was less than thrilled. Revain handled it. Thing when drilling a 2- Inch bar The nature of the animal with cobalt I think Even with small chipping on a cutting edge the chisel still does a good job.