AASONS Spring Balancer, 3 to 5 kgs Bearing Retractable Tool Fixture Holder Balance Scale  (Balance)

Torsion Adjustment: There is a torsion adjustment device in the back, which can adjust the pulling force for safety. Safety Device: If the spiral spring breaks due to the heavy suspended object, the inner safety device can make it locked immediately to prevent the suspended object from falling. Wide Application: The alloy hook has a large load-bearing within the range of 6.6lbs - 11lbs. Applicable in hanging, transporting, and moving tools, fixtures, rolling parts, racks, etc. Widely applicable to many fields, car manufacturing, factory, etc