Description: MaterialThis bike chain tensioner is made of aluminum alloy, which is lightweight, durable and not easy to damage, It can be used for a long time.DeisgnThis bicycle chain adjuster can change multi speeds bikes into single speed bike, prevent the chain from slipping, ensuring perfect chain tension for your chain to make you pedal with less effort.FeatureBicycle chain stabilizer can effectively prevent the chain from falling off due to instability during riding.Easy InstallationThe single speed chain adjuster tensioner is easy to use and install, light in weight, and is a good accessory for bicycle lovers.ApplicationThe bicycle chain tensioner perfect bike accessories can be used for mountain bikes, road bikes, fixed bicycles, folding bicycles, etc. Specification: Material: Aluminum Alloy Size Chart: Bike Chain Tensioner: 10cmx10.84cmx6.4cmx2.65cm/3.94inchx4.27inchx2.52inchx1.04inchBicycle Chain Adjuster: 2.7cmx5.1cm/1.06inchx2.01inch Package Includes: 1 Chain Tensioner,3 Wrenches1 Chain Adjuster Note: Please allow slightly errors due to manual measurement and different monitors.