Milwaukee® Carbon Brush Assembly is designed for 3/8" drill, 4 1/2" angle grinder with paddle switch as well as lock-off, 1/2" hammer-drill, 4 1/2" rat-tail angle grinder, 6" angle grinder with paddle switch, 4 1/2" and 5" & 6" angle grinder with slide switch, 4 1/2", 5" and 6" rat-tail angle grinders with lock.