Features: This electric hoist support for lifting device, lifting capacity up to 600 kg Thehoist support arm is used to connect the lifting device. In this case, the rotating arm must be mounted on a well-fixed scaffolding tube with adiameter of 48 mm. Using a telescopic arm, it can be extended to a maximum of 110 cm, at this length, with a maximum payload of 300 kg. 180angle adjustment across the horizontal plane. For use with electric hoist, and adopt of high quality material, with high strength and high safety Specification: Simple load for lifting weight: 300kg Weight lifting double load: 600 kg Minimum length: 75 cm (carrying capacity: maximum 600kg) Maximum length: 110cm (carrying capacity: maximum 300kg) Size: as the picture shows Weight: Approx.8000g or 282.2oz Package list: 1 x extension cross bar1 x diagonal draw bar1 x main stressed cross bar4 x connection between diagonal and cross bar1 set x screw.