Features chamfered side plates for fast, smooth, quiet shifts- SRAM and Shimano compatible- Delta hardened pins (not on PC830), step riveting, and nickel-silver plating on upper-end models for extra durability- The higher the model number the greater the load capacity- Includes PowerLink connector thats opens and closes without tools- Save an additional 5+% on select 25/box bulk chains with connectors (no aftermarket packaging)