Teks #9 x 2-1/2 in. Steel, Hex Washer Head, Drill Point Roofing Screws with Washers 50-Pack provide secure metal-to-wood fastening with strong holding power, without the need to pre-drill. The sharp self-piercing point is ideal for fastening corrugated roofing panels to wood structures. The self-sealing neoprene washer provides a waterproof seal and a premium finish provides exceptional corrosion resistance in harsh outdoor environments. Install with a standard screw gun and a 1/4 in. hex drive bit.Ideal for metal to wood applications and provides exceptional corrosion resistance especially when fastening roofing panels to wood structuresSelf-sealing neoprene washer provides a waterproof seal in harsh outdoor environmentsHigh performance drive surfaces and hex head reduce cam-outs to penetrate surface the first time for easy installationClimacoat premium coating means no streaking from corrosion and rust for long-life finish in exterior applicationsPrecise sharp point designed to drill, tap and fasten all in 1 motionProvides secure fastening with strong holding powerNo pre-drilling necessaryHighly versatileCommon project applications: roofing, HVAC, steel stud framing, gutters and register vents