Production process of retractor

The spring balancer is a hand operated tool. The use of the spring balance can help lifting heavy weights up to 400 kg by hand easily. The advantage of load balancer is small volume, small space, large capacity, suitable for many work. Light spring balancer is a special kind of spring tools balancer. Light capacity spring balancer is different from spring balancer in shape. Light spring balancer is more flat, more space saving. If your operating space is too small to fit a