SET INCLUDES : Our bike chain repair tool set is perfect for all your bike chain repairs, including bike chain remover, bike chain splitter, chain wear indicator. Bike Chain Wear Indicator Tool: Allows you to quickly assess the wear and stretch of the chain, helping you decide whether to replace it with a new one. Bike Link Pliers: For quick release chain links, advanced opening and closing tools, link extenders and connectors. Bike Chain Removal Tool: Very clever, easy to break, easy to rewind, unique groove on the top allows you to see how far the pin extends and use the pin to remove the cut chain. Advanced Bike Chain Tool: Made of high quality K5 steel + carbon steel + carbon steel manganese, small and sturdy, easy to carry, can be used as a travel tool kit to solve most bicycle problems.