Product description：

　　A tool spring balancer are a type of lifting equipment that will take the weight (neutralise the weight) of a tool or equipment which is attached to it and this is achieved by applying the correct tensioning a spring of the tool balancer.Because the tool spring balancer now takes the load effectively the item is now nearly weightless. If slightly more tension is applied the return spring of the tool balancer than the self weight of the tool the tool being balanced then the tool will retract slowly; the more tension that is applied to the spring the harder it will be for the operator to pull down the tool.