SRAM PowerLock Silver 11 Speed (4pcs)Sram: ROLL WITH IT No weakest link. SRAM'S 11 speed chain features the PowerLock connecting link the only secure tool less attachment device for a SRAM chain. THINGS TO REMEMBER Part of the SRAM 1x integrated drivetrain No tools necessary to install From a long line of tough, light weight chain engineering from SRAM A pack of four SRAM PowerLocks.