Utilizing a newly developed manufacturing technique never-before seen in the off-road chain market, ProTaper Pro Series chains feature innovative forged pin collars that have been seamlessly incorporated into the outer chain plate. By cold-forging pin collars to encase the chromium carbide-layered pins, outer chain plate thickness can be slimmed to reduce weight while increasing tensile strength. The O-Ring model also features Slim O-Ring Technology, which offers superior, long lasting chain lubrication in a slimmer profile, eliminating the clearance issues of competing O-ring chain designs. The result is slim, ultra-premium, lightweight racing chains with unparalleled strength and prolonged lubrication over the competition. Slim outer plates with forged pin collars for added fatigue strength and chain life. Chromium carbide layered pins for reduced friction and impact load absorption.