Working Principle：The tension of the internal coil spring and the gravity of the suspended weight are used to offset each other, so that the suspended object reaches a weightless balance state, thereby allowing the weight to move freely up and down within the working stroke of the balancer or stay in various locations Adjustable Design: Equipped with 2m long spring and adjustable tension, you can adjust the tightness as needed and fix the rope at any height Wide Applications: Our spring tensioners are easy to operate with pneumatic, electric and hydraulic tools and can be used for hanging, collecting, handling and disassembling tools, clamps, fixtures, etc. Longterm use: The telescopic spring balancer is equipped with highquality extended and thickened buffer rubber sleeves, which can effectively reduce the buffering force, protect tools and balancers from wear, extend service life and double safety 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