High performance all purpose self-countersinking screw for fast accurate driving into softwood, chipboard and most hardwood. Two patented slots prevent splitting close to edge. Ribs and tucks enable flush fitting without surface damage. Waxed thread. Zinc and yellow passivated, for up to 20x more rust resistance than standard BZP screws. The advanced design and high performance ensures fast and accurate driving into softwood, chipboard and most hardwood. These all purpose self-countersinking screws feature ribs and tucks under the head, ensuring they sit flush against the surface without damaging it. They are designed for maximum precision, with slots to prevent splitting when working close to the edge. A 20 degree needle point is sharp enough to penetrate almost all timbers without the need for a pilot hole. A wide, deep thread is designed to reduce driving resistance by up to 40 percent. Less torque is required for faster job completion. Ribs and tucks ensure a flush fitting without any surface damage. Reinforced collar prevents snapping and gives depth. Sharp, wide and deep thread reduces driving resistance. 20 degree needle point penetrates wood easily without a pilot hole. Two patented slots prevent splitting when screwing close to the edge. Zinc and yellow passivated provides up to 20x more rust resistance than standard BZP screws.