This item is designed for use with Milwaukee impact wrenches. It is an authentic component which is supplied by the original equipment manufacturer. The friction ring is secured on the anvil and it helps to secure a socket. Over time it may wear out, get damaged or lost eventually requiring a replacement to ensure your tool functions properly. One durable metal friction ring is included. Check the owner's manual and the diagrams of your model for the exact location and the correct application of this component. Replacing it is a simple task that should only require a screwdriver and pliers.