Easy to use, can be applied using appropriate driver bit in a power tool. D25 drive, self drilling cross point. Countersunk ribbed heads self embed and can be driven flush with timber surface or countersunk below the surface. The top thread on the self embedding self drilling hardwood screws assists in pulling the head down into hardwood timber without predrilling or countersinking. ChemShield coating provides corrosion resistance for external applications. Approved for use in ACQ treated timbers. APPLICATION: For fixing decking, flooring, slatting and general timber to timber external applications END USER: Builders, Carpenters, Landscapers DIYers FEATURES: Cold forged and roll formed, countersunk heads with nibs, coarse thread 2/3 of shank length, top thread with cross point made from hardened wire with ChemShield engineered finish. Patented drive and point