3M Scotch-Brite CX-DN deburring disc uses silicon carbide 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 33194 having a very coarse grade. The threaded arbor attachment allows for easy mounting to the tool or pad. 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 deburring disc can be run at a maximum speed of 13300.