The aluminum alloy hand tie gourd is also called tights, mainly applied to the maintenance of electricity, telecommunications, and railways. The tight wire is suitable for tight lines in the line construction, adjusting the arc, pulling lines and other work. The tights are particularly suitable for small workplaces, fields, high -altitude operations, and traction from different angles. The appropriate operating location, or expand its load capacity with a small tonnage, can use several machines to work side by side for larger tonnage loads.