SelfTite Clamps - Pre-tensioned for easy field installation. The chrome-vanadium spring steel maintains a constant tension on the Onix under all operating conditions. SelfTites incorporate a zinc coating to guard against corrosion. If you choose SelfTites, we strongly suggest you use our SqueezeTite Pliers. This Tool grabs the SelfTite clamp tightly, and holds it firmly while you slide the clamp into place. Unlike ordinary pliers, it also protects the Selftite clamp against being "sprung" and bent out of shape.