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 steelslip 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-slipgrip. Safety factor 2:1. Cable diameter 3/16 in SPECIFICATIONS: No.144SB-6 Maximum lift 6 ft , and leverage 30:1. No.144S-B Maximum lift 12 ft , and leverage 15:1.