Contrary to most reviews, I bought this to use for making holes in masonry. Unfortunately it was complete junk. I drilled one hole and on the second I broke off and got stuck in the cinder block. The racquet has a lot of flex so I kept the speed a little low and normal but it hit the block terribly and then failed. It ended up being a waste of money for me and I can't even say I benefited from it because I only had to drill 4 holes and he couldn't even finish the job. I would love to return it and get my money back.