precision-cast aluminum alloy ratchet wheel, one piece construction galvanized, aircraft quality cable. Interlocking, precision fit, steel alloy pawls with safety spacer sleeve. Cold rolled, high strength, tempered steel frame and handle drop-forged steel slip hooks with OSHA Recommended safety latches. Heavy gauge steel, reinforced ratchet guard. Aircraft-type, heat treated bolts. High tensile strength, full rotating steel swivel. Trouble-free, "Notch-At-A-Time" letdown. Permanent, comfortable, non-slip grip. Safety factor 2:1. Cable diameter 3/16 in. Specifications, #144SB-6 Maximum lift 6 ft and leverage 30:1. #144S-6 Maximum lift 12 ft and leverage 15:1.