This 12 speed KMC chain is high performing and extremely durable. It works perfectly on all standard bikes but is also designed for E-bike use, working efficiently under the stress and loads that E-bikes put on the drivetrain. The Non-Directional design makes it independent of direction which allows maximum compatibility on MTB or Race bikes. With its unique stretch-proof treatment, the durability has been enhanced massively by reducing the attrition between the inner plates and pin. As a result, chain life has been significantly prolonged. The upper bridge forms a slant vault parallel to the tip of tooth movement. This vault shape makes the tooth and chain engage much more precisely. Features: Includes non-reusable 12x Missing Link Size: 1/2" x 11/128" Pin length: 5.2mm Double X Durability Non-directional Compatible with all 12x drivetrains (except SRAM Eagle Transmission T-Type, 12-speed road/gravel) Weight: 272g (110 links)