Also known as duct snakes, fibreglass snakes, cable feeding snake, fibreglass trace rod and fibreglass duct rod. Used for feeding or hauling ropes into duct/conduit / PVC pipe or through walls for the installation of power or communication cables. Usually supplied as a frame, case or housing with a length of coiled fibreglass/nylon/spring steel / stainless steel on rotating inner cage for easy coiling and uncoiling. Most larger longer fibreglass units feature a tracer wire.
Alternate terminology: Duct Snake, Fibreglass Cable Rodder, Fibreglass Duct Rodder, Fish Tapes.