The chains and accessories for the transport of white meat in the processing lines are subjected to carbonitriding treatment, to resist wear and thermal changes. Chains which are supplied electrolytically galvanised, have particularly restricted measurement tolerances, as they are required to adjust to the characteristics of the rolling hollow wheels. Other sectors that use these chains are spiral bakery industrial facilities, for the handling of bread during the cooking process: once again the chains undergo case-hardening treatments. Finally, small diameter chains are used for the transportation and handling of eggs.