Item Type: Wire Threader Material: Glass Fiber Length: Approx. 20m / 65.6ft Diameter: Approx. 4mm / 0.16in Purpose: Wire threading device can be used for wiring installation of right angle pipes, wall recessed slots, floor conduits, etc. Package List 1 x Wire Threader 1Flexible Ability: This wire threader has good resilience, soft property and strong tension. More professional and convenient to use 2Spring Head: Designed with a spring head that the wire threader can realize 360 non dead angle design bending. 3Flat Head: The flat head of the wire threader is convenient for you to install wires, save time and effort, easy to use 4Applicable Scenarios: The wire threading device can be used for wiring installation such as right angle pipe, wall concealed slot, floor conduit, etc. 520M: This wire threader is 20m long that it is sure to meet most of your needs, take it with confidence