Product Description Blue-Kote Screws feature three anti-corrosion layers, making them the perfect choice for a wide variety of indoor and outdoor projects. Blue-Kote Screws provide rust-resistance up to 400% greater than zinc-plated screws and work with pressure-treated material. Available in a variety of sizes, thread options, head styles, and quantities. From the Manufacturer The Kreg 1-1/2-Inch coarse blue-kote screws with pan-head is ideal for outdoor projects using soft woods between 7/8-Inch and 1-1/8-Inch thick. The washer head prevents overdriving in pocket bottoms, which is especially critical in composite and plywood work pieces. The self-tapping type 17 auger tip eliminates the need to pre-drill, and its durable steel shank creates a nearly unbreakable screw. The blue-kote finish features 3 corrosion resistant layers to protect against all sorts of outdoor conditions. This pack includes 100 screws.