8 piece burr set includes sizes: sa-5: cylindrical shape 1/2" x 1"; sa-3: cylindrical shape 3/8" x 3/4"; sc-3: cylindrical radius end 3/8" x 3/4"; sc-1: cylindrical radius end 1/4" x 5/8"; sd-1: ball shape 1/4"; sd-3: ball shape 3/8"; sf-3: tree shaped radius end 3/8" x 3/4"; sf-5: tree shaped radius end 1/2" x 1".