As mentioned by some other reviewers, the heads of these screws break off very easily. I ended up throwing away about 1/3 of the entire box because I seemingly accidentally stripped the assembled deck boards in while retracting them. I've tried several different attachments (including the one in the box) and got the same results with all of them. I also tried a regular drill along with an impact wrench and both caused the problem. Spend your money elsewhere if you don't feel like tearing your hair out.