Powerpro, 250 Piece, 10 x 1.5", Black, WB Premium Metal To Wood Roofing Screws Contractor Pack, Designed To Fasten Steel Roofing To Wood Purlins Used In Post-Frame Construction, & Plywood Or OSB Used In Residential Construction, Produced With Coating With Enhanced Corrosion Resistance Over Painted Heads, 2.5 Mils Of Powder With Chromate Sealer, Molded Diecast Zamac 3 Zinc Aluminum Alloy Provides Lifetime Protection Against Red Rust On The Head & Washer, Micro-Bit Point Reduces Metal Shavings That Can Embed Themselves In The Rubber Washer, Starts Fast Finishes Straight, Includes Pro-Stick Bit, 40 Year Warranty.