Retractors: Designed to retreat the cable when no force is applied. An amount of downward pressure is required to keep the suspended object at its extended position. Spring Balancers: Allows the operator to move a suspended tool up or down with minimal effort. The tool remains almost weightless during use. An adjustment can be made that allows the tool to remain in position or to retract when tool is released. Ratchet Lock Feature: An automatic arresting mechanism is available in some models. It allows setting retraction stops to keep the load suspended at predefined positions. The stops are automatically activated if the tool is moved back slowly. If pushed back fast, the mechanism remains inactive.