HIGH LOAD CAPACITY - Single line can carry 1,100 pounds, 33 feet per minute, up to 40 feet. The two-wire can carry 2,200 pounds, 16 feet per minute and up to 20 feet. Heavy duty, high load-bearing galvanized hook with pulley for double-line operation. HIGH HEAT DISSIPATION PERFORMANCE - Copper core motor has good thermal conductivity and electrical conductivity, low voltage loss, high motor force and low heat production. The built-in cooling fan improves heat dissipation. DURABLE - The surface of the high carbon steel wire is galvanized, smooth and resistant to corrosion. The strands are tight, not easy to break, strong in bearing capacity, efficient and safe. The metal case is bright red, strong and impact resistant, and easy to remove.