Bi-Metal Wing Drill screws for heavy steel are specifically designed for fixing timber, composite panels, and cladding materials directly into heavy gauge steel sections without the need for pre-drilling. The integrated wings on the screw ream out a clearance hole through the timber or panel material before snapping off once the drill point reaches the steel substrate. This prevents the material from binding to the threads and allows the self-drilling point to penetrate the heavy steel efficiently for a strong and secure fixing.

Manufactured using advanced bi-metal technology, these screws combine a hardened carbon steel drill point for exceptional drilling performance with a stainless steel body that provides excellent corrosion resistance and long-term durability in external and high-exposure environments. Commonly used in structural timber-to-steel construction, roofing, façade systems, and heavy steel framing applications, they are ideal for projects where strength, reliability, and weather resistance are essential. To install, simply position the material and drive the screw directly into the steel section using a suitable drill driver at the recommended speed until the fixing is fully secured.