A single thread woodscrew mainly used in various types of timber and man-made boards or into masonry with the use of a plastic plug.Double countersunk reduces the likelihood of head shear and assists completion of countersinking. Wax lubricated to enhance screw insertion time, extra driving torque and resistance to corrosion . 40? deep single thread to provide a secure fixing with high pull-out resistance. 25? sharp point and single lead for a fast start and improved thread acceptance. All sizes up to and including 75mm are fully threaded and lengths 80mm and above all have 70mm thread length.