New Ingersoll Rand 1/2" Anvil Assembly for I-R Models IR Models 2135Ti, 2135PTi, 2135TiMAX, 231C, 232TGSL, 232TGTI and more, Part # 231B-A626.  This anvil assembly includes the socket retainer and O-Ring.  Please feel free to let us know if you have any questions.  We understand that time is money and a broken/weak tool cost you money, so we strive to ship very quickly in order to minimize your downtime.  Thanks for looking and feel free to contact us for all your tool part needs.