BBB Bicycle Chain Wear Check Tool Chain Checker Hex Bolt Wrench F (BeeBeeBee) Multi-Tool + 5/6/8mm BTL-125c

A multi-functional chain checker with valve tool and wrench functions. An easy-to-use tool for checking chain wear. A value of 0.75 means that the chain is 75% worn and will need to be replaced soon. If the result is 1.0, the chain wear has reached 100% and the chain needs to be replaced immediately. *Not compatible with some single-speed chains. Includes a chain hook for convenient attachment and detachment of the tuning parts. Features a valve tool and a wrench function for 5/6/8mm hex bolts. Weight: 30g