Airgoesin 12 Dental Diamond Polishing Wheel Saw Disc Cutter + 5 HP Shank Mandrel 2.35mm Arbor hole measures 2mm with a small drill, hanging mill or electric grinder used for cutting laminate, plexiglass panels, stone, plastic, wood, jade, agate, crystal, ceramic, plaster, acrylics, resin and other products cut. Shank-HP, 2.35mm(3/32") diameter 12pcs discs in 6 shapes Come with 5pcs shanks