An excellent value in a basic do-it-all chain tool. This 2-piece cast CrMo chain tool features a hollow removable handle which can be slipped over a small Allen wrench to give extra leverage. The Universal Chain Tool includes a chain hook to make chain repair easier, is compatible with all single speed and most multi-speed chains, including 10 speed hollow pin chain.Tools2 totalChain Tool Cast CrMo SteelChain HookStainless Steel WireTool MaterialHardened SteelAdded FeaturesChain Pin BreakerChain Pin CompartmentSize (L x W x H)8.3 x 4.3 x 1.5 cm3.3x 1.7x 0.6Weight82 g / 2.89 oz* The chain tool is compatible with all single and multi-speed pin type chains, except Campagnolo® 11 speed hollow pin chains.