The basis of every Sram 12 speed Eagle drivetrain is its chain-and the NX Eagle chain is designed and manufactured using genuine Sram's Eagle architecture, so it is fully compatible with every other component in the Eagle ecosystem. The NX Eagle chain features solid pin construction, Eagle PowerLock and smooth, efficient shifting that you can count on every time out.   Features Eagle PowerLock chain connector with flow link technology provides better chain-guiding and increased longevity.. Improved wear resistance on Eagle cassettes and rings..