The sleek 2-piece cast CrMo chain tool is compatible with all single speed and most multi-speed chains, including 10 speed hollow pin chains. (Not compatible with 11 speed chains.) Tire levers and glueless patches round out this incredible kit. * Virtually every tool needed to repair a road or mountain bike is included in this mini take along toolbox. There?s also a special compartment to securely store two removable chain links and pins. * Chain pins and links compartment + Disc Brake Spacer (Chain pins and links are not included.) * Integrated chain hook holds links during assembly. Chain Pin Breaker * The chain tool head can be used as a mini hammer