Milwaukee 1/4" Anvil Assembly is designed to replace the anvil assembly included in the M12 FUEL 1/4" Ratchet. This low profile anvil assembly helps reduce the overall profile of the 1/4" ratchet, allowing for increased access in tight and hard-to-reach applications. Installation and of the anvil assembly require snap ring pliers and a flat head screwdriver, which are not included. This upgrade is for users looking to enhance the versatility and functionality of their ratchet tool. Model Number: 49-06-3052