SRAMS Super Narrow 10-speed PowerChain™ features the PowerLock® connecting link — the only secure tool-less attachment device for a sub 6mm chain in todays market. The SRAM PC-1031 chains feature our solid rivet pin construction. Lighter weight plus smooth, positive, precise shifting adds up to true performance. Compatibility extends to industry standard 10-speed systems.Features:- Simply stronger. The PC-1031 chain benefits from design for better performance- PowerLock® tool-less connecting linkSpecifications:- Technology Highlight(s): PowerChain II™, PowerLock®- Closing Link: PowerLock® tool-less connecting link- Pin Treatment: Chrome hardened pins- Weight: 272g (114 links)- Rivet Type: Solid pins- Recommended Group: SRAM GX 2x10- Compatibility: Industry-standard 10-speed systemsTechnology:PowerChain II:Extremely strong. Incredibly precise. SRAMs PowerChain II increases front and load shifting performance without sacrificing rear shifting precision. The Step2™ riveting process increases the Push Pin Power for increased strength and durability.PowerLock®:SRAM chain engineers developed PowerLock as a tool free, sure and 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 PowerLock is good for a one-time application only.