Bl423 Riv ASME/ANSI Leaf Chn 2 X 3 Lacing 100Ft Reel 1/2" Pit,PK100 They are used primarily as tension linkage or force transmision chains for lifts and/or hoists. Assembled chains are wupplied with a rust prevent oil to resist rust durring shipment and storage. SENQCIA Hi-Max Leaf Chains are manufactured .