Luminescent fiberglass rods glow in the dark to make fishing voice, data and video wires easier in dark spaces, such as above ceilings, in walls, and below sub-floors. More flexible for fishing in walls through outlet box holes. Sturdy, steel-threaded connectors are interchangeable with Greenlee 1/4 IN (6.4 mm) Fish Stix. Clear, non-metalic storagetube keeps Glo Stix charged and ready to use. 200 lbs. (0.9 kN) maximum pulling strength.