I have been using two of these drills from Harbor Freight http://www.harborfreight.com/3-8-eig...uck-95877.html for about two years and have had no problem. Some of the bad reviews refer to the gear head stripping out the gears but I think that might be from using it to drill with and sanding does not put as much torgue on the gears. I am not sure but mine have worked great but I am not a heavy user maybe a couple dozen bowls a year but I am a heavy handed sander.