[High-Quality] - The best replacement or standard screws on the market for metal-to-wood metal roofing. - Type-17 sharp tip easily pierces OSB, wood, and plywood. - 1" long. - 5/16" Hex Head [Long-life Dome Cap] - Dome Cap completely encapsulates the EPDM washer. - Provides a tight seal on the washer that prevents UV damage from occurring over time. - Protecting the washer from the sun guarantees to reduce cracking. - 40-year guarantee when installed correctly. - Dome cap screws are guaranteed to last years longer than industry standard exposed washer screws. [Red Rust Prevention] - Each painted option is painted with a powder-coating system. - Each hex head is coated with a zinc/aluminum alloy that prevents red rust from ever starting. {Easy to Install} - Can be installed by anyone, regardless of experience. - All orders include a magnetic 5/16" Hex Driver. - Advanced forging process technology - Type-17 Sharp Tip easily pierces wood fibers, eliminating the need for pre-drilling, and prevents pigtails from embedding themselves in the EPDM washer. [The Perfect Finishing Touch] - 1" in length. - EPDM washer. - Dome Cap Hex Head. - The perfect finishing touch for your metal roof! #12 x 1" ZXL Dome Cap Long Life Metal Roofing Screws feature a Type-17 Sharp Tip that easily pierces OSB and plywood, and a Dome Cap Head that completely covers the EPDM washer, preventing UV damage and lasting years longer than industry standard screws. With an oversized diameter and washer, these screws are perfect for replacing #10 screws and filling wallowed out screw holes.