The Topeak Super Chain Tool is a compact and lightweight tool designed for use with all chains except Campagnolo® 11 speed hollow pin chains. It is equipped with 5 and 6mm Allen keys, as well as a chain hook. The Allen keys and chain tool fit together to form a conveniently stored unit. All the tools are made of hardened steel for durability. The clever design allows for easy operation of the tools both separately and together. With a weight of just 105g, this chain tool is the perfect accessory for any cyclist.