Very uncomfortable. I bought these to drill through a steel trailer after the cobalt drill bit from my Milwaukee set broke, thinking 10 drill bits would go through (trailer firmware 7.5 x 11 feet) but no, I have a whole one ordered second set which is even worse. The beats varied. Some popped the first whole I tried to drill, some clicked in the first 5, the exceptions took longer. Also, the first pack I bought had a hole pre-drilled to fit the #8 screws I was using, then the second pack had drilled holes they just jumped into, so the bit width mismatch is another Problem is what I've encountered. I get what I pay for, eh.