Solid pins, inner and outer plates make for an economical chain choice with all the performance of higher level X-Series chains. -Includes KMC Missing Link 11 -Features KMC&';s highest pin power for unsurpassed riveting geometry -KMC&';s Double X durability -Double X bridge shape allows for precise gear shifting -Outer plate chamfering allows for accurate shifting -Inner plate chamfering allows for expeditious shifting -1/2" x 11/128" chain is compatible with Shimano, Campagnolo, and SRAM 11-speed drivetrain systems