This thing is very bad! Using the same drill, which is pretty hard at 7.5 amps, this drill went through hardened steel like it was wood, LOL! And I was just blown away, it didn't rip on day one, which is typical for me and was predicted by a lot of reviewers. So why 4 stars? Well the tip has a few dents from day one, from regular use, no stains or dents so I expect the bit will be useless after another day's work and at a top price you'll lose a star for should the deal.