D.I.D is a Japanese manufacturer of high-performance transmission parts renowned worldwide for the quality of its chains and chain kits. Closely involved in competitive racing, the brand also supplies OEM parts for numerous machines. The D.I.D 520VX3 X-Ring Rivet Link 520 is 60 mm in size. Upgraded from the DID 520 VX2 chain, the DID 520 VX3 X-Ring chain fits a wider range of street, ATV, or off-road applications up to 800cc. New "Direct Energy Transfer" gives you amazing throttle response due to D.I.D's state-of-the-art technology to increase chain rigidity. Features greatly improved seal performance due to increased X-ring retention and durability. Average tensile strength of 8,210 pounds, Weight (kgs/100 links) = 1.52 (3.35 pounds). It is a rivet-style master link.