Features: Elevates your cycling experience with our bikes chain tensioner, suitable for 5 speed, 6 speed, and 7 speed bicycles, ensuring smooth shifting and performances. Feature a tension arm designs, this multifunctional tool acts as a chain tensioner, pullers, and presser, craft from aluminum alloys for long timing use. Streamlines your bike's drivetrain efficiency with this easy to use chain tensioner, enhancing gear shifts and extending the lifespans of your bicycles component. Great for professional bike mechanic, cycling enthusiasts, and person look to maintain optimals chain tension and prevent chain skipping. A must having for bicycles repair shops, cycling clubs, or home use, this tool simplifies chain maintenance for a continuing ridings adventure. Specifications: Materials: Aluminum Alloy Color: Black/Silver Package Weight: approx.108g Size: approx.114mm/4.48in (More Size Detail, Please See Picture.) Package Includes: 1Pc Bikes Rear Derailleur Chain Tensioner note: Please allow 1-2cm error due to manual measurement. Please make surer you not mind before your bid. Due to the differences between different monitors, the picture may not reflect the actual color to the item. Thanks!