Feature:1. Chain Tensioner: Motorcycle chain tensioner aims to keep the chain tight and prevent the chain become too loosen cause the chain to fall off.2. Wide Application: Chain guide tensioner for ATVs, Dirt Bikes, Motorcycles, can work with all chain sizes.3. Durable Material: Heavy duty chain roller tensioner is made of high quality metal and plastic, durable and sturdy.4. Wear Resistant: The chain roller with longer ride can reduce wear of the chain, 4mm thick metal bracket, stronger than other turnbuckles.5. Stable Performance: Included improved spring with thicker wire, and comes with seamless steel bushing for smooth rotation.Specification:Item Type: Chain Roller TensionerMaterial: Metal+plasticColor: BlackFitment: Suitable for most of dirt pit bikes, street bikes, motorcycles, ATV, off road vehicles, etc..Package List:1 xChain Roller Tensioner1 x Spring