The RIDGID 33665 Chain Extension Assembly is designed for use with Soil Pipe Cutter Models 206, 226, and 286. The assembly includes two sections, each composed of a cutter wheel, inside link, outside link, and cutter pin. Each section is approximately 3 inches long. The 33665 Chain Extension Assembly is completely assembled, except for one cutter wheel and one pin, packed loose. These are needed to make the connection on the existing chain. In order to use the assembly, remove the ring at the end of the existing chain, and then connect the loose wheel and pin to the inner links on the chain. Attach the ring to the end of the chain extension (sold separately).