Self drilling mushroom head screws are ideal for fixing to steel where a neat / architectural finish is required. This screw is perfect in fixing panelling, signs, brackets and various steel components to steel frame sections where a clean, aesthetic look is required. ICCONS self drilling mushroom head screw is bi-metal which incorporates a hardened steel point (tek point) for efficient drilling into steel with a 304 stainless steel shank and hex head for corrosion resistance (please see screw self drilling capacities).