I had to install Blum concealed hinges so I needed this size for the holes. It worked great. The holes were smooth and easy to use. I saw several reviews complaining that the holes were rough or wandered around a bit. I didn't have the problem at all. I drilled holes in the maple cabinet doors and the holes were perfect. Even if you punch a small starting hole with an awl or nail to insert the bit's tip, it stays straight and doesn't move. I don't have a drill press so I used a hand drill and had no problems. I haven't used it much so can't comment on how long it stays sharp, but for $8 I don't see what you can go wrong.