【Grit】 - Including the most commonly used grits: 2 X 40/60/80/120/180/240/320/400 grits, total 16 pieces 75 x 533 sanding belts, meet your daily sanding and polishing needs. 【Material】 - The sanding belts are made of durable, fully resin-bonded open-coated aluminum oxide grains, quality workmanship allows for uniform sand grain, ensuring fast and long-lasting sanding. 【Connection】 - Precision-designed bi-directional belt joint, diagonal connection eliminates joint bump, the interface of the belt sander belts is flat, solid and not easy to break under pressure. 【Application】 - Suitable for 533X75 mm (21X3 inch) - providing coarse to fine sanding, stripping and sanding for wood, aluminum, fiberglass, rubber, plastic, stone and non-ferrous metals etc. 【Multiple Grits】 - Very complete grit from coarse to fine 40/60/80/120/180/240/320/400, meet all your sanding jobs. 【Grips】 - Including the most used grits: 2 X 40/60/80/120/180/240/320/400 grits, total 16pcs 75 x 533 sanding belts, meet