RK Chain SO Series Size 428

RK Chains: All RK chains are pre-stressed and pre-stretched to ensure equal load distribution and minimnal maintenance.They are made of the highest grade medium carbon alloy steel available with all the components shot-peened and heat treated.SO Series: Pro O-ring chain lasts five to eight times longer than standard chains.Lubricated with specially formulated, vacuum injected U-grease, and locked in by tough Nitrile Butadine rubber O-rings.Polished and shot-peened link plates.High tensile strength ensures reliable performance.