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