Long service life Made from high-strength aluminium alloy, this bicycle chain tensioner offers durability, wear resistance, and anti-corrosion properties to provide a stable, reliable structure over time. Carefully crafted Anodized lightweight material resists oxidation for long-lasting use. The double hole split design provides a secure fit, while the bright color adds style to any ride. Installation is easy with just one screw. Prevent frame scratches and chain issues Designed to protect the frame and keep riding smooth and safe. Its practical design helps prevent frame scratches, reduces chain tangling, and prevents the chain from falling off. The adjustable function provides a simple and effective way to tension a single speed system. Quick setup and ease of use Easy and quick installation that does not require complicated tools. Get your bike running in no time and easily adjust the chain to ensure a smoother ride. Compatibility and use scenarios - Compatibility: Designed to tension a single speed system. - Use on city commuter bikes that use a single-speed drivetrain for reliable tension and protection. - Use on fixed-gear or single-speed conversions for mountain or road bikes to ensure smooth operation and frame protection. - Use in DIY bike builds or upgrades where quick, tool-free installation and adjustable chain tension are beneficial.