Chain length (links): 126 links. SRAM PC X01 12 Speed Eagle Hollowpin 126 Links Powerlock Chain. Sram Eagle PC XX1 Hollowpin 12 Speed Chain 126 Link With Powerlock In Gold. Outer link finish: Nickel. All-new Eagle PowerLock® chain connector with FLOW LINK technology provides better chain-guiding and increased longevity.