【Material】 The bicycle chain tightener is made of high-strength aluminum alloy with upgraded CNC process, wear-resistant and anti-corrosion.
【Bright Color】CNC cutting with smooth surface and edges; the surface is anodized with bright colors and luster, making your bike more cool and fashion.
【Function】 Prevent the chain from falling off and avoids tangle and keeps the frame from scratching. Provide a simple, effective and adjustable way to tension a single speed system.
【Easy to install】No need other complicated tools. Installation is simple and quick, make chain adjustment easy
【Application】Fits 3/8" (10mm) axles, universally for single speed mountain bikes road bicycles cycling