Faithfull Grinding Wheel Assortment, 36 PieceFaithfull Grinding Wheel Assortment contains 36 grinding wheels of assorted sizes and grits with a 1 4in shank to suit most electrical and cordless drills. They are ideal for sharpening and grinding steel, and the pack contains six each of the following: 77 x 12mm Fine 50 x 12mm Fine 37 x 24mm Fine 65 x 6mm Coarse 50 x 6mm Fine 15 x 24mm Coarse SAFETY TIP Faithfull grinding wheels are for use in power or cordless drills only and are not suitable for