Item Name: Single Speed Track Bicycle Accessories Fixed Gear Bike Chain Tensioner Adjuster. Item: Bike Chain TensionersQuantity: 2PcsColor: SilverMaterial: SteelSize: 5.2cmx 2.0cm(2.05''x 0.79'')Features:100% new and high qualityThis is great because it can prevent chain slack on BMX, children bikes and any single speed bikeUsed to prevent the rear wheel from slipping forward under pressureFor track, BMX, and fixie bikes with rear entry drop outsPackage Included: 2Pcs x Chain Tensioners *
