Mini Screw Mandrel Shank:

European made nickel mandrel (3/32") is used to mount the silicone polishing wheels. Release the screw at the top, slide on the wheel and put the screw back on to hold the wheel in place. Now the wheel is mounted and ready for use in the Motorized Bead Reamer or the Foredom Flex Shaft.  

The Polishing Wheels are sold separately.