A chain is a serial assembly of connected pieces, called links, typically made of metal, with an overall character similar to that of a rope in that it is flexible and curved in compression but linear, rigid, and loadbearing in tension. Those designed for transferring power in machines have links designed to mesh with the teeth of the sprockets of the machine, and are flexible in only one dimension. Features. 75 Flat Hot Dog Roller Chain Repair Kit. Made with high quality materialSpecifications. Height 1.63 in / 4.14 cm. Width 23.75 in / 60.33 cm. Length 2.38 in / 6.05 cm