Black & Decker™ Ball bearing is designed for type 1 4267 and 4292 die grinders and DeWalt® type 1 DW880 2 1/2" straight grinder, type 1 DW888 2" die grinder, type 2 DW880 2 1/2" straight grinder, type 2 DW888 2" die grinder, type 3 DW880 2 1/2" straight grinder, type 3 DW888 2" die grinder, type 3 DW888-AR 2 die grinder and type 3 DW888-B2 die grinder.