Which device allows a climber to work hands-free?

The positioning device is designed specifically to allow a climber to work hands-free while climbing or performing tasks on a telecommunications tower. This device secures the worker in place, enabling them to use both hands for tools or equipment without the risk of falling. Unlike other equipment, such as safety harnesses, which primarily serve to keep the climber secure during descent or falls, or descent devices and rope grabs, which focus more on safety during movement, positioning devices facilitate the climber's ability to operate effectively while maintaining safety.

Rope grabs are mainly used to secure the rope while allowing for some vertical movement, but they do not provide the same level of stability and hands-free operation as positioning devices. Therefore, the correct choice aligns with the unique purpose of allowing a climber to perform tasks without needing to constantly hold onto a safety line, making work on the tower more efficient and safe.