The STS External Render board screw is a high-performance screw designed specifically for use with our 12mm STS Construction Board. When installing our Render boards it is important to ensure the screws used are flush, strong and suitable for high levels of moisture and weathering. The Ruspert coating on the screws is a perfect barrier for all corrosion, rust and weathering. These screws are 38mm long and come in a handy plastic box of 250 screws.