CGW-Camel Grinding Wheels' C3 ceramic quick change discs have a fast, aggressive cutting action and provide contaminate-free results on hard-to-grind, heat-sensitive materials, such as aluminum. These discs are available with either a roll-on or turn-on attachment. Both styles utilize an automated spin-weld attachment process for fast and secure fastening. The discs come in 1-1/2", 2" and 3" diameters and range in 24 to 120 grit sizes.