Well made unit. The head has a slight twist due to the block and head thread mismatch. My biggest complaint is that I bought this staple and screw bit. Because the chuck has four bits, it is not compatible with standard hex bits. I don't know, I'll explain, but the bits slip in the chuck and I can't tighten them enough. That says nothing about the ability to work with standard wood drill bits, which I think would be very good.