Accu-Turn Bosch Style Positive Rake Bits have the unique capability to cut hard spots on rotors, drums and flywheels. OEM: 433796, Use On Models: 7700, 8920, 8922, 8944, 8989, 8990, 8991, 8993, 8995 and 8997 Brake Lathes. 3 Cutting Edges.