I got this for making pepper mills on my wood lathe and after a bit of work it works great. My Forstner bits didn't fit in when I first got it. Turns out there are little bits of metal sticking out in the screw holes that prevent anything from slipping all the way through. When sandpaper didn't work I used a 3/8" metal drill bit to clean the inside with some cutting oil. After that it works as advertised!