3M Cubitron II cut & grind wheel uses ceramic aluminum oxide as the abrasive material and has a diameter of 4 1/2 in. 3M incorporates this ceramic aluminum oxide material into the cut & grind wheel forming a grit of 36. In addition to the other aspects of these parts, another important component of these is the thickness. This 3M part is 1/8 in thick. 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 cut & grind wheel can be run at a maximum speed of 13300 RPMs.