This aluminum alloy chain tensioner is ideal for cyclists who want to convert their folding bikes to single speed. Its robust design ensures use, while the chain guide prevents the chain from falling off. It's for various riding conditions, it helps maintain consistent chain tension, enhancing your overall cycling experience. Features -Color:Red -Material:Aluminum alloy, stainless steel -Size: 11.00X2.50X2.20cm/4.32X0.98X0.86in -Convenient: easy to carry and store, ideal for travelers and city commuters -Efficient chain drive: enhances chain transmission stability and efficiency, minimizing chain drop risks -Safe riding: ensures the chain stays in place, providing a safer cycling experience -High durability: made from aluminum alloy and stainless steel for extended use -Versatile application: It's for singlespeed bikes chain adjustments and repairs Package list: 1 x Bicycle Chain Tensioner