Includes (4) 330003-39 Ball BearingsNew, Bulk PackedGenuine OEM Replacement Part # 330003-39-4PKConsult owners manual for proper part number identification and proper installationPlease refer to list for compatibilityCompatible with the following: DeWalt: DW568 1-1/8, DW570 1-1/8, DW570 1-1/8, D25404, D25730, D25730, D25701, D25701, D25890, D25840 SDS Max, D25851K, D25602K 1-, D25651K 1-7/8, D25501K 1-9/16, D25762K 2in, D25891K SDS Max, D25553 1-9/16, D25721K1-7/8", D25831K12 lb. SDS Max, DW545K-AR, DW545K-AR, DW570K-ARElectric ROTARY, DW570K-ARElectric ROTARY, Black and Decker: RO600 Sander, RO600 Sander, RO600K Sander, 11666 Sander, 7696, 7696, 7696, 7696, 7696