The replacement part number is N403111 496244-00 N591846 584558-00.It replaces for Dewalt 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 for Dewalt 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 for Dewalt D25334K-AR (Type 1) 3kg Sds Plus Rotary Hamme Power Tool,D25334K-AR (Type 2) 3kg Sds Plus Rotary Hamme Power Tool,D25334K-B2 (Type 1) 3kg Sds Plus Rotary Hamme Power Tool,D25334K-B2 (Type 2) 3kg Sds Plus Rotary Hamme Power Tool,D25334K-B3 (Type 1) 3kg Sds Plus Rotary Hamme Power Tool,D25334K-B3 (Type 2) 3kg Sds Plus Rotary Hamme 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 difference or discrepancy in the actual product, which does not affect the use, please don't mind, thank you!Color: As ShownMaterial: plasticPackage Contents:1 x Chuck AssemblyOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.