【Anti-Corrosion Coating】:Our long wood screws passed the 1000 Hour Salt Spray Test without coating failures. The yello coating creates a robust anti-corrosion and anti-rust barrier that offer excellent protection against corrosion and rust, guaranteeing their longevity even in harsh conditions. 【Professional Design】:Our structural wood screws use T30 Star drive system ensure a safe and efficient fastening process without slippage,The knurled shank of log wood screws reduces the torque required for drilling and prevents wood from cracking. 【WIDE APPLICATION】:These construction lag screws are ideal for outdoor, homeand industrial applications such as deck buildinglog construction , log construction,timber framing, pole barns. 【MODIFIED TRUSS WASHER HEAD & STAR DRIVE】The modified truss washer head design of our structural lag screw guarantees a flush and neat finish, enhancing the overall appearance of your woodworking creations. Featuring a T30 star drive style, these wood screws ensure a safe and efficient fastening process without slipping. 【GOOBETTER】:We pay great attention to the reputation of our brand Goobetter, so our product quality control sells very strict,You will receive a box of wood screws and 1 T30 star drive . packaging using environmentally friendly reusable materials, storage does not take up space. Description:The structural wood screws for metal is made of high quality Carbon steel materials,durable and sturdy.The Carbon steel is high strength and no deformation,which can be used for long time.Stainless self tapping screws are ideal for using in wood,metal and other thouhg materials.Self tapping sheet metal screws can widely used in various industries,such as construction,engineering,manufacturing,etc.Screws for metal are very precise and easy to ues and clean.