The Park Tool Chain Link Pliers are designed to install or remove a chain without driving out a rivet. Lots of modern chains like SRAM and Shimano use a master link system which is also called quick link or power link. The jaws of these pliers are specially shaped to open and close a master link. They are made with durable steel and have an ergonomic vinyl cover on the handles. The Park Tool Chain Link Pliers make changing your chain easier than ever.