The cable tie with metal pawl ensures a firm and lasting closure. The metal Pawl is the metal tooth that locks the cable tie into position. The metal pawl also helps prevent cable wear and damage. Won’t damage Wires. The smooth round edges do not cut insulation or hands and are comfortable to work with. These non-flammable ties are ideal for harsh, corrosive and salt water environments, chemical and radiation exposure, food processing and vibrating equipment.