3M Scotch-Brite SE-DR Non-Woven Aluminum Oxide Brown Quick Change Sanding Disc - Coarse Grit - 1.5 Inch Diameter (18240) - Perfect for Metal Finishing & Wood Sanding - Case Pack

3M Scotch-Brite non-woven SE-DR quick change disc uses aluminum oxide as the abrasive material and has a diameter of 1 1/2 in. Since this product is non-woven, grade is generally used to describe the abrasiveness; with the 18240 having a coarse grade. All abrasive products that rotate or spin, such as the ones in this category, have a maximum speed at which you can run them. This 3M quick change disc can be run at a maximum speed of 30000 RPMs.