To support all types of controls on the ground: pushbutton box, control for stages, various levels or staircase...
With detent pawl: allows to block control on the ground with the desired height, to free to draw downwards.
Automatic recall by spring.
Rope steel covered plastic.
Drum painted steel, support aluminum.
N.B. to take account of the weight of the pushbutton box as well as weight of the electrical cable to support