First let me say that these beats did what they were advertised to do. They did a great job driving the drywall screws and making a recess without breaking the paper surface. BUT I found the main downside for my use was that they were much shorter than I expected. This made it difficult to get a good angle when screwing into corners and where ceiling boards meet wall boards. In addition, the bits held perfectly and did not rip off! Overall decent value.