Cobalt Chains Metric (or European) Standard chains are commonly used in lumber industry, pulp and paper processing, and other bulk material conveying applications. They are built to International Standards Organization (ISO) 1977 and 8165 series and Workshop standards for dimensional consistency, interchangeability, and correct sprocket engagement. They feature additional heat treatment to the side plates, effectively doubling the ultimate strength and service life when compared to other chains on the market. These chains are available with multiple roller options and with many common sizes on-hand, ensuring prompt order fulfillment.