1.':Made of high quality materials such as hardened steel or lightweight aluminum, these chainrings for bikes are wearresistant and provide reliable performance on long rides.' 2.'Precise Tooth Design The optimized tooth profile reduces chain slip and improves shifting precision. This makes these chainrings suitable for both recreational and competitive drivers.' 3.'EASY ASSEMBLY AND MAINTENANCE The chainrings are designed for hassle installation and come with easytofollow instructions. So you can get started quickly.' 4.'IMPROVED RIDING EXPERIENCE Increase the efficiency and speed of your bike with these high performance chainrings and ensure a quieter and more enjoyable ride every time.' 5.'Compatible with various types of bicycles: whether road bike, mountain bike or trekking bike, our chainrings are designed for various cranksets and a variety of uses.' 6.'Bicycle single disc chain guide guard obviously durable, lightweight, rustproof.' 7.' enclosed chain guide and bass guard, light weight but high strength.' 8.'Guide and protect the chain while effectively not easy to jump and sink, making it a smooth and easier rider and providing you with a good driving experience.' 9.'The chain guide protector, which is suitable for most bicycle seats such as mountain bikes, road bikes, folding bicycles.'