Milwaukee® Bearing Retainer Plate is designed for 6", 5", 4 1/2", 115 mm angle grinder, 4 1/2" Magnum® sander/grinders, 5", 125 mm, 115 mm, 4 1/2" dial speed super Magnum® grinder, 4 1/2" super Magnum® sander/grinders, 115 mm Magnum® grinder, 5" Magnum® sander/grinders and 6" right angle grinder.