Due to the TWO unique patented slots (25mm and above), the R2 Cutter allows screwing close to the edge without splitting. Under the head are BOTH ribs and tucks enabling the screw to sit flush and tight without surface damage. With the ability to penetrate almost all timbers without a pilot hole, this really is a screw worth using! Distinct Ribs and Tucks - Self countersinking into all timber and board materials. No need to counterbore. Re-inforced collar - Prevents snapping and gives depth for a wide, deep pozi to be inserted, therefore reducing the risk of "cam-out". Lubricated, Sharp, Wide, Deep Thread - Up to 40% reduction in driving resistance therefore less torque required. Quick and easy penetration WITHOUT a pilot hole. Yellow Tropicalized - Giving approximately 20 times more rust resistance than standard BZP screw. Two Patented Slots - Prevents splitting when screwing close to the edge. 25" Needle Point - Immediate start