It must be checked for the size, the Anvil Assy have different size.Compatible with: DCF899B Type 1, DCF899B Type 3, DCF899M1 Type 1, DCF899M1 Type 3, DCF899P1 Type 1, DCF899P1 Type 3, DCF899P2 Type 1, DCF899P2 Type 3.it fit to 20V DCF899 TYPE 4 Cordless Impact Wrench.this kit is ift to Dewalt Impact Wrench Kit 1/2 Anvil,chuck Replacement,Detent Pin Anvil,Driver Spindle Hammer Block For DCF899 DCF899B DCF899M1 DCF899P1 DCF899P2 type 4 Impact Wrench