I used this guy to drill three 1/2" wide, 2" deep holes in my house foundation for attaching eyebolts. The first two holes I drilled took 20 minutes each. It's hard to walk But the third one lasted about 2 minutes. I assume concrete comes in different hardnesses? The drill itself appears to be of very good quality. Switching from a rotary hammer to a conventional drill is not difficult at all. And the depth gauge came in very handy. I also found the front handle attachment very clever. You can adjust it for left or right hand.