TheSram PC1031 10 Speed Chainfeatures 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. Sram PC1031 10 Speed Chain Features Simply stronger. The PC-1031 chain benefits from design for better performance PowerLock® tool-less connecting link