QWORK Spring Balancer, 2 Pack 6.6lbs 11lbs Bearing Retractable Tool Fixture Holder for Assembly line

Well Built: Made of the heavy-duty iron case and steel cable, strong and durable. Reliable Hook: The alloy hook has a large load-bearing within the range of 6.6lbs - 11lbs. 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: Applicable in hanging, transporting, and moving tools, fixtures, rolling parts, racks, etc., Manufacturer: QWORK