The GX Eagle(TM) chain is designed with SRAM's Eagle(TM) geometry, the GX Eagle(TM) chain features solid pin construction, Eagle(TM) PowerLock(R) and smooth, efficient shifting that you can count on every time out. Flow Link Ultra-smooth chain inner-plates are completely devoid of square edges, resulting in a chain that engages the cassette and chainring with far less friction, for quieter performance and better wear life. The design allows a narrower overall profile that can withstand greater angles, and also allows for a flatter outer-plate, which means more consistent chain riveting and enhanced overall strength. PowerLock(R) SRAM chain engineers developed PowerLock(R) as a tool free, sure, and consistent way to connect our chains. While PowerLock(R) does not require special tools for install, the especially tight tolerances of 10-, 11- and 12-speed drivetrains mandate that each PowerLock(R) is good for a one-time application only. Specifications: Speeds: 12 Speed Links: 126 Chain Width: 5.25mm Chain Connector: PowerLock (Single Use) Pin Type: Solid Color: Silver Weight: 260g Included: PowerLock masterlink (00.2518.027.003)