Not ideal but since 1/4" end mills aren't designed to cut that much material at once they did just as well as they could . expect in this price range. Use this tool to make a half T-slot along the edge of several pieces of oak. It worked well until it got to the narrow part of the T. The cutter in this part couldn't remove too much material in one pass. In the end I removed most of the material on the table saw and used a drill to trim the pieces to their final size.