High performance all purpose self-countersinking screw for fast accurate driving into softwood, chipboard and most hardwood. Features 2 patented slots to prevent splitting close to the edge. Ribs and tucks enable flush fitting without surface damage. Includes waxed thread. Zinc and yellow passivated for up to 20x more rust resistance than standard BZP screws. These Reisser Cutter screws combine ultimate performance with a perfect finish. Their advanced design 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. Designed for maximum precision, with slots to prevent splitting when working close to the edge. A 20deg needle point is sharp enough to penetrate almost all timbers without a pilot hole, allowing quick work. A wide, deep thread is designed to reduce driving resistance by up to 40 percent, requiring less torque and enabling faster job completion. Reinforced collar prevents snapping and gives depth. Sharp, wide and deep thread reduces driving resistance - less torque required. Zinc and yellow passivated provide up to 20x more rust resistance than standard BZP screws. This is the Reisser Cutter Pozi Screw 3.5 x 30mm 200 Pack in Yellow.