These Forgefix Twist Nails are a unique twisted shank nail for attaching metalwork joists hangers straps etc The twisted shank assists in absorbing movement that may occur in construction They have a sheradised finish for corrosion resistance This finish is a thermal diffusion process in which Zinc powder is vaporised and diffuses to the surface of the Twist Nail to form a sacrificial corrosion protective ZincIron alloy coating thus dramatically increasing the nails durability APPLICATION The Twist Nail is the most popular construction nail used in fixing of joist hangers restraining straps and Galvanised banding