Just tried these screws to fasten an item to a brick wall to fix . I used the included Masaner bit that came with the screws with the impact drill. I was able to drill two and a half holes before the drill failed! And part of the drill bit is still stuck in the hole, so I'm not sure if I can get the broken part out of the hole. Otherwise I'll have to drill more holes in the wall. Do not buy if you do not have a drill of this size.