Media could not be loaded. I bought this as a cheap guide to drilling straight holes in wood and aluminum with my hand drills. I tried 3 different hand drills and none of my drills fit. The quality is pretty low and I'll probably have to change this a lot to make it work. In retrospect, I should have bought a cheap drill press. Update: I modified with a 90 degree aluminum shank that I cut out and some rivets so it would support my drill without hesitation. I also filed down the sides of the screw holes for the lever to make sure it sits really flat. I do NOT recommend using this product. Even after hours spent modifying it to make it work, it's still a smoking pile of junk. Even a cheap drill would be more useful than this thing.