Introducing the top-quality 3 Tek Screws from Double Blue Fastener Manufacturing Co., Ltd., a leading manufacturer and supplier in China. We take pride in our state-of-the-art factory that produces the most reliable and durable screws on the market. Our 3 Tek Screws are available in a variety of sizes and finishes, providing you with the perfect screw for any application. They are perfect for fastening metal roofs, metal siding, and many other types of construction projects. Our screws feature a sharp point and a self-drilling tip that can easily penetrate metal and other hard materials, providing an effortless installation process. At Double Blue Fastener Manufacturing Co., Ltd., we use only the best materials and latest technology to produce high-quality screws that exceed industry standards. We are committed to providing our customers with the best value for their money. Trust us to be your single-source supplier for all your fastening needs. Order from us today and experience the best in Chinese manufacturing expertise.