Milwaukee® Carbon Brush Assembly is designed for 6124-30 5" hp rat-tail angle grinder with lock-on, 6117-31 5" hp angle grinder with paddle switch, 6161-31 6" hp angle grinder with paddle switch, 6117-30 5" hp angle grinder with paddle switch with lock-on, 6124-30 6" hp rat-tail angle grinder with lock-on, 6117-31B 5" hp angle grinder with paddle switch and brake, 6117-33D 5" hp angle grinder with slide switch & speed dial, 6161-33 6" hp angle grinder with slide switch, 6161-30 6" hp angle grinder with paddle switch with lock-on, 6124-31 5" hp rat-tail angle grinder and 6117-33 5" hp angle grinder with slide switch.