Goldscrew Yellow zinc-plated Carbon steel Wood Screw (Dia)3.5mm (L)30mm, Pack of 200. Top quality, waxed single thread, multipurpose screw. Popular with the professional. Features a lower screw-in torque and faster drive speed. Suitable for screwdrivers, combi drills and impact drivers.. This pack of Prodrive drive recess countersunk flat head wood screws are constructed from a durable case and are through hardened. They are 30mm in length and come partially threaded on longer screws. They have coarse thread and come wax coated for lubrication. They\'re ideal for a range of DIY applications. Woodscrews by Goldscrew.