Features:【Specification】 2 inch 50 pieces sanding discs per bag.【Durable Material】Premium aluminum oxide abrasive for sanding foot has good abrasion resistance.【Velcro and loop backing】 Makes it quick and simple to remove and replace gravel, and it fits well with the sander when woodworking.【Wide Application】 Good choice for wood, leather, stones, glass, rotary tool drill-grinder.【Function of various Grits】40-240 Grit: coarse grained finish, suitable for polishing metal, wood and other hard or rough objects. Specifications:Grit: 24, 36,40,60, 80, 100,120,180,240gritDiameter: 50mm/2 inch (approx)Small enough to fit in tight corners. The pads are ideal for preparing the surface and getting the product to the level you need. Unique torque safety screw. Distinguished ore, long service life. High-density planting sand for better cutting performance. Ideal for metal processing, such as automobiles, motorcycles, painting sheet metal parts, tooling, bicycle parts, textile machinery, medical device parts, day surface hardware, hydraulic equipment, stainless steel kitchen utensils, stainless steel sheet, golf head, vacuum finish and other products, polishing rounding, etc. ShankSpecification:Diameter: 45mm Shank Size: 1/4" 6.3mm Type: Round Screw Hole: M6 Max RPM: 30000rpm Packed in Set:25/50pcs Sanding Disc with 1pc shank Note: Please allow 1-2cm errors due to manual measurement. Due to the different display of each computer, the pictures may not reflect the actual color of the item.