D.I.D chain is used by the factory race teams and is the #1 chain manufacturer in the world. Solid rollers, shot-peened parts. High cylindrical and roundness accuracy. Exacting tolerances provide low friction. Pre-stretched.
 
Specifications
Extended riveted bushing "anti-kink" design
Special alloy steel
Average tensile strength of 6,930 lbs.
Includes clip link.