The advanced timber fixing screw features an 8mm hex flange head and is specifically designed for decking construction. It includes a reamer to prevent jacking, a quick start type 17 slash point, under-head ribs, and synthetic lubrication for smooth installation. Surface hardened for durability, this screw is widely used in exterior timber, fencing, and landscaping applications. Finished with a multi-layer Ruspert coating, salt spray tested to 1000 hours.