Features 1、Alloy Single Disc Screws: Lightweight and sturdy, each screw is made of high strength alloy, providing excellent strength and toughness while enhancing the performance of your mountain bike. 2、Precise 6.5MM Diameter Design: Specifically optimized for mountain bikes, the 6.5MM diameter design ensures great fit between screws and chainrings, enhancing stability and peace of mind during rides. 3、Secure Locking Structure: The unique locking design prevents screws from loosening during rides, ensuring the stable and reliable locking of chainrings even on bumpy roads, enhancing the overall reliability and efficiency of the transmission system. 4、Integrated Tooth Pattern Processing: The accurate machined integrated tooth pattern improves screw bite, making installation and removal quick and easy, saving maintenance time and allowing for more enjoyable rides. 5、Sturdy and Long Lasting: The alloy material provides excellent durability, protecting against break in rainy or coastal environments, maintaining a refreshing appearance and functionality for extended product lifespan. Item Type: Single Chainring Bolts Material: Alloy Package List 4 x Disc Bolts 1 x Sticker