ladder sprocket chains, jack chains & register chains manufactured for mechanical drive systems. complete drive mechanism packages composed of matched plastic sprockets & chain are available. ladder chain can be made endless to specification or pre-cut to required lengths. basic steel, hi-carbon spring steel, brass & stainless steel are standard materials. bright finish steel & bright zinc are standard steel finishes. electroless nickel plated also available. plastic sprockets available in a wide range of pitch diameters & bore sizes. custom hub shapes available.