1. Preformed armour rods protect wire from the vibration of wire, clamp pressure stress, friction, electric arc and all other external damage. Short preformed armour rods vibration is not in serious cases, may in a short span of the line to protect against electric arc wire, friction, or other damage. Can also be used as a conversion, a conversion has been damage to the wire, to restore the original mechanical strength and wire resistance. Can also be used to protect the branch lines to avoid cable branch point arc and friction due to the damage.

2. Preformed armour rods and short preformed armour rods have simple lines, each formed ATC preformed wire, wire wrapped grip force generated when, to protect the wire.