These 50mm titanium coated pozi screwdriver bits are ideal for all Pozi No 2 screws, manufactured from high-quality S2 steel with a titanium nitride coating for long lasting durability. These screwdriver bits are suited for high resistant materials including hard wood, metal, plastic & drywall & can be used with all power drills, cordless drills & screwdrivers with a 14;" hex bit holder.