John King Climax engineering class drive chain is used for power transmission and speed reduction in many heavy duty applications. Our drive chains are designed to exceed the listed ultimate strength ratings, ensuring high fatigue strength and the ability to withstand extreme shock loads. Each component is manufactured entirely from alloy steel, carefully machined with high press fit tolerances. Components are heat-treated with the latest techniques to ensure the longest service life for both the chain and sprockets. We keep most common sizes on-hand, guaranteeing prompt order fulfillment.