Clean junk, 3 holes in 1/2" plywood and a hole saw cut into the stock. Has no pins or anything on the shank to prevent this relies entirely on the threads in the metal cutter head to prevent this.Once you start using it the torque of the cutting action strips the threads and it just spins on the shaft.Don't waste Your time and money doing this now I have to cut a bunch of parts and order a new hole saw from someone else and wait for it to arrive ruined my plans for today.