Sealtite Kwikseal Woodbinder screws are high quality screws designed to attach long-life metal roofing and siding on post-frame and residential metal roof applications. These 304 Stainless Steel Woodbinder screws provide lifetime protection in the harshest environments. They are an excellent choice for use in animal confinement applications or for aluminum liner panel applications. The Type A point requires a pre-drilled hole in steel, but not aluminum. Additionally, the high quality EPDM sealing washer provides a reliable seal with no leaks every time.