KMC's X9SL chain is the all-around best-performing, lightest chain available today. The X9SL is a result of 3 years of development and testing by KMC, in which they radically rethought the chain production process to produce a product unmatched in lightness and strength. In testing, this chain was put through the wringers by cyclists of all disciplines, from road racing to mountain downhill.The X9SL features hollow inner and outer plates and hollow pins. The pins are riveted using KMC's "Lat Step" process, which seals the outer plates with a massive 350 kilograms of force, making it the strongest chain connection in the industry today. The chain's outer plates are shaped with KMC's X-bridge design, which allows for smoother, more precise shifts. High-precision manufacture tolerances, along with a proprietary X-SP friction-reducing treatment extends chain life.Ti-Nitride "gold" treatment is not purely aesthetic. This is a hard coating which further reduces friction between the pins and plates, and creates a smoother surface which helps repel dirt particles. A Ti-Nitride chain will last even longer than the standard X9SL.We highly recommend this chain for its superior shifting performance and long life. Additionally, it is suitable for both Campagnolo and Shimano systems, and will perform better than the manufacturers' chains.Included is KMC's re-usable "missing link" master link for easy removal and re-installation.