This part is an OEM direct from Ingersoll Rand. The socket retainer kit is made for use with several impact wrench devices. The kit includes one socket retainer spring and plastic seal. This item helps to secure the anvil to the hammer case. The socket retainer kit is sold individually. A pair of pliers, screwdriver and a hex wrench are o...Read moreften required for making the replacement. Please refer to the specific manual for further instructions.