This high-quality clip-style connecting link for RKM 520 standard non O-ring chains could keep you from getting stranded . It's always smart to have a spare master link in your garage or repair kit. Specifications: Pin length in mm: 18.80mm. Maximum wear life index: 200. Maximum tensile in pounds/feet: 7700 pounds/feet. Master link type: Clip. Weight in pounds per 100 links: 3.65lbs. Max cc: 400cc street/NA-off-road. 19.2 links per foot. 15.875mm pin to pin center.