Static rope

A static rope is a low-elongation rope that is designed to stretch minimally when placed under load, typically less than 5%.

In contrast, a dynamic rope is designed to stretch up to 40%.

[1] Static ropes have a wide variety of uses, for instance in fire rescue operations[2] and caving.

[3] Static ropes have some applications in climbing, such as hauling gear, though lead climbing is always done with a dynamic rope, since a fall on a static rope is stopped too quickly[4] and may lead to serious injury.

because of there low elongation and high weight limit, they excel at doing this job.