Fixed and hovering: The spring balancer has a selflocking function, which can keep the tool hovering anywhere, put the tool in a position where it can be used immediately, and reduce the movement of the operator. Highquality workmanship: Our telescopic spring balancer shell is made of thickened alloy cover, which is wearresistant, anticorrosion, lighter and more durable. Safety protection: The alloy steel hook is equipped with a safety buckle, which will not fall off during use. The spring balancer is attached with a rubber cover, which can protect tools and balancer from wear and tear, and double the safety. Adjustment function: Thickened and quenched adjusting bolt, large adjustment force clockwise, small adjustment force counterclockwise, easy to operate, use with lock pin, adjustable size, improve work efficiency, reduce employee fatigue WITH SAFETY DEVICE: This product can be used to manually lock the suspended object with a safety device. If the suspended object is overweight and the spiral spring is broken, can be locked immediately to prevent the suspended object from falling