3M 3M Scotch-Brite Non-Woven Aluminum Oxide Aluminum Surface Conditioning Quick Change Disc - Medium Grade - 4 1/2 in Diameter - 5/8-11 in Center Hole - 64363 61500313285

3M Scotch-Brite non-woven aluminum surface conditioning quick change disc uses aluminum oxide as the abrasive material and has a diameter of 4 1/2 in. Since this product is non-woven, grade is generally used to describe the abrasiveness; with the 64363 having a medium 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 aluminum surface conditioning quick change disc can be run at a maximum speed of 12000 RPMs.