All RK chains are pre-stressed and pre-stretched to ensure equal load distribution and minimal maintenanceThey're made of the highest grade medium carbon alloy steel available, with all components shot-peened and heat-treatedHeat-treated medium carbon alloy steel constructionAll components heat-treated and shot-peened for maximum strengthTwo-point pin riveting and solid rollersFor motorcycles that did not come with an O-ring or heavy-duty chain as standard equipmentChain includes clip connecting link