This Reisser Cutter Pozi Screw is a high performance all purpose self-countersinking screw designed for fast accurate driving into softwood, chipboard, and most hardwood. Its advanced design ensures a perfect finish. Key features include two patented slots to prevent wood splitting when screwing close to the edge. Ribs and tucks under the head allow for flush fitting without surface damage. The screw has a waxed thread and a 20 degree needle point, sharp enough to penetrate most timbers without the need for a pilot hole. The wide, deep thread reduces driving resistance by up to 40 percent, requiring less torque and speeding up your work. A reinforced collar prevents snapping. This screw is zinc and yellow passivated, providing up to 20 times more rust resistance than standard BZP screws. Ideal for professional and DIY use.