Dia 1/2" Sand Drum with 2 Mandrel Fit Dremel ,Grit 80,100 Pics Used For Polishing Good on metals, woods, plastics, ceramics, etc. 100 piece 80 Grit, 1/2"(6.35mm) Diameter 2 piece 1/4" X 1/2" Rubber Mandrels 1/8" shank size (Fit Dremel and other Rotary Tools)