Narva Mountable Head Cable Ties are made of high quality nylon cable ties. Strong, durable and secure the ties are U.V resistant and self lock. These cable ties are perfect for electrical and computer‚ cords, Christmas lights and plenty more. Ideal for bundling various items together at home, office, garden, workshop and helping to sort out cords, electrical cables, wires. These cables are easy to use put the tail of zip tie through the ratchet hole in the head part, tighten it and cut the excess part with scissors or cable tie gun.