The Motorcycle Front Sprocket Holder Lock Nut And Bolt Washer 13T 520 Chain Drive Gear is designed to ensure secure installation of the front sprocket on your motorcycle. This kit includes the necessary components for connecting the chain to the sprockets, including a lock nut and washer. The lock nut features a threaded hole for easy installation, while the washer provides a smooth surface for the chain. The size of this kit is compatible with KEWS YBS300, YB300H sprockets with chain drive. This product not only improves the performance of your motorcycle but also adds durability and longevity to the components.