General description 35 sanding belts in total, with grits included: 40, 60, 80, 120, 180, 240, and 320, ideal for various sanding and polishing needs. Designed for use with a 13 x 457mm belt sander, these belts are suitable for heavy to medium coarse sanding, stripping, and polishing. Technical specifications Dimensions: 13 x 457 mm Material: X-backing, open aluminum oxide grit, high-quality resin over resin bond Connection: Precision two-way joint with a diagonal connection for a flat and solid seam Usage Effective for sanding wood, aluminum, fiberglass, rubber, plastic, stone, and non-ferrous metals. Can be used for tasks such as cleaning keyholes, sanding curved surfaces, and working on blades.