Heavily chamfered outer plates improve shifting performance while a new inner plate finish with chrome hardened pin creates one of the longest lasting chains available. The Hollow Pin construction provides smooth & precise shifting with massive weight savings. Power Chain II Extremely strong. Incredibly precise. SRAMs Power Chain II increases front & load shifting performance without sacrificing rear shifting precision. The Step 2 riveting process increases the Push Pin Power for increased strength & durability. Power Lock SRAM chain engineers developed Power Lock as a tool free, sure & consistent way to connect our 10 speed chains. While PL does not require special tools for install, the especially tight tolerances of 10 Speed drive trains mandated that each Power Lock is good for a one-time application only.