1. Good durability: Made of wear resistant and corrosion resistant aluminium alloy material, this bicycle chain tensioner provides a sturdy and strong structure with high durability, ensuring a long life of your bicycle chain. 2. Bright color: Made of high quality anodized material, this bike chain tensioner is not easy to oxidize, ensuring a durable and vivid appearance. It features a user friendly single bolt design, and the split double holes ensure a secure and adaptable fit. Its bright color adds a touch of style to your ride. 3. HIGH PRACTICALITY: This highly practical and adjustable chain tensioner prevents the chain from falling off, prevents tangling, and provides a simple, effective way to tension a single speed system. 4. EASY ASSEMBLY: Install our bike's chain tensioner effortlessly with a simple setup that requires no complicated tools. Simply adjust the chain of your bike and continue riding.