The replacement part number is N403111 496244-00 N591846 584558-00. It replaces D25114K-AR (Type 2) Rotary Hammer Power Tool, D25124K-AR (Type 1) SDS-Plus Hammer With Quick C Power Tool, D25304 Type 1 SDS Rotary Hammer, D25304 Type 2 SDS Rotary Hammer, D25304K (Type 1) 1 SDS Hammer, D25304K (Type 2) 1 SDS Hammer. It fits D25314 Type 1 SDS Hammer, D25314K (Type 1) 1 SDS Hammer, D25314K (Type 2) 1 SDS Hammer, D25324K (Type 2) Rotary Hammer Power Tool, D25324K Type 1 Rotary Hammer. It fits D25334K-AR (Type 1) 3kg SDS Plus Rotary Hammer Power Tool, D25334K-AR (Type 2) 3kg SDS Plus Rotary Hammer Power Tool, D25334K-B2 (Type 1) 3kg SDS Plus Rotary Hammer Power Tool, D25334K-B2 (Type 2) 3kg SDS Plus Rotary Hammer Power Tool, D25334K-B3 (Type 1) 3kg SDS Plus Rotary Hammer Power Tool, D25334K-B3 (Type 2) 3kg SDS Plus Rotary Hammer Power Tool, D25414KT-AR (Type 1) 4kg SDS-Plus Std Feat Com Power Tool, D25414KT-B2 (Type 1) 4kg SDS-Plus Std Feat Com Power Tool. Please note: There may be slight color differences or discrepancies in the actual product, which do not affect usage. Color: As Shown Material: Plastic Package Contents: 1 x Chuck Assembly Only the above package content is included; other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture to vary slightly from the real thing. Measurement may vary by +/- 1-3 cm.