Milwaukee® 9" Type 28 Wheel Guard Assembly is designed for 6080-20, 6081-20, 6082-20, 6086-20, 6088-20, 6089-20 grinders. Wheel guard uses 45-88-8466 nylon washer to increase the performance of the guard. It is used for grinding wheels with threaded hub and helps in removing wheels from spindle. It can be rotated around the spindle to ensure optimum protection to the operator.