25°sharp point for easy penetration into wood/chipboard/MDF, plastics and thin sheet metal. Plated in zinc and yellow passivated to give a high resistance to corrosion. Made from C10-22 steel to ensure consistent quality. Double countersunk reduces the likelihood of head shear and assists completion of countersinking. 40° deep single thread to provide a secure fixing with high pull-out resistance. Lubricated with Gleitmo 615 (dilution ratio 1:5) to enhance screw insertion time and a greater resistance to corrosion. (Gleitmo 615 is non-toxic and environmentally friendly). Fully threaded up to 70mm, thereafter partially threaded.