Cat® Retainers are installed into machined grooves in housings/bores (internal) or on shafts (external) and are engineered for strength and longevity in a variety of applications. Cat® retaining rings are manufactured to precise specifications and are built for durability, reliability and productivity. You can count on this Built For It product to help you get more done.Application:Cat® Retaining rings are assembled to a shaft or housing groove to retain a component. Consult your owner's manual or contact your local Cat® Dealer for more information.