Well Built: Made of -duty iron case and steel cable, strong and . 2 Pack 6.6lbs - 11lbs Reliable Hook: The Metal hook has a large load-bearing within the range of 3.3lbs - 6.6 lbs. 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 suspended object, the inner safety device can locked immediately to prevent the suspended object from falling. Wide Application: The Metal 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. Color: As Shown Material: Metal Package Contents: 2 x Spring Balancer Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.