Material: Black Phillips Truss Head Wood Screws Are Made Of Carbon Steel And Coated With Black Phosphate, Rust Proof, High Strength, No Deformation, Can Be Used For A Long Time, While The Material Is Environmentally Friendly, Non-Toxic, Non-Polluting, Twice As Hard As Copper, And Will Not Be Easily Stripped By The Screw Gun | Multi-purpose: Black Truss head screws are mainly used in home appliances, furniture and many woodworking and DIY work, furniture and cabinet industry, because it has good holding power, suitable for non-metal or soft metal, no mounting holes, directly screwed into the product with truss head screws, no nut fit. Can achieve the effect of connection tightening | Good holding power: Black Deep thread design of Truss head tapping screws, strong and durable, can provide good holding power in different materials, to achieve the effect of connection and fastening | Package Quantity: We have checked all the truss head screws, the quantity you receive after purchase will not be insufficient, and we will give you an extra cross drill tail for each box of truss head screws to meet your needs when using these screws | Workmanship: Using high-precision cutting technology, the threads are very precise, clean and sharp, deep and clear threads can easily penetrate wood and plastic, to ensure a solid fixation, while not easy to deformation and sliding use