Garryson Flap Wheels quickly remove paint, varnish and rust, leaving the surface smooth, clean and ready for repainting. For use on wood, metal, fibreglass, filler and plastics. Strips and sands in one operation without clogging.Many uses on cars, boats, in the home, in the garage and workshop. 6mm (1/4 in) shank fits all drills. The Garryson SD5020F Flap Wheel has the following specification: Size. 50 x 20mm.Grit: Fine.