Black & Decker™ Pinion is designed for 4 1/2" small angle grinder, 4 1/2" grinder, 4" and 4 1/2" angle grinder, 4 1/2" grinder snap on, plate joiner, small angle grinder, ELU plate joiner, ELU flat dowel jointer, 4 1/2" sander/polisher, 4 1/2" sander/grinder and DeWalt® cordless cut off tool, grinder, jointer plate, 14.4 V and 18 V plate joiner, angle grinder.