RUGGED AND DURABLE - SG TZH Outdoor Wood Screws made of Thickened rod by, high quality low carbon alloy steel special heat treatment process，which has higher corrosion resistance and anti-rust effect than ordinary screws, longer service life, not easy to damage, more solid, excellent mechanical properti. EXQUISITE CRAFTSMANSHIP - This Deck Screws diameter: #10, length: 3-1/2inch, excellent craftsmanship makes our T25 star drive style, not slippery, fast, not easy to break, high strength, not easy to deform, not eccentric. Anti-corrosion coating - 1000-hours salt spray test, 4-layer coating provides superior protection against rust and corrosion the screws less prone to rust in outdoor construction Torx/star Drive - Torx/star drive make installation easier, save drive torque and further fasten screws into wood construction, eliminate loose or camout. Value Package, Easy to Use - This Deck Screw pack comes in approximately 116 pieces and comes with 2 T25 Star bits. They are suitable for various indoor and outdoor scenarios.