The hybrid energy chain YE is the best mix of lightweight plastic and tough steel that can easily handle high unsupported travels. It was developed to meet the requirements of construction machinery and lifting equipment. The requirement was to implement the maximum possible unsupported length with compact dimensions and the lowest possible weight. However, steel energy chains have the disadvantages of high assembly costs and weight. The YE system combines the higher strength of steel elements with the low weight and flexibility of plastic components. No screws, rivets or bolts are used which can become loose under vibration.