Chippy screw Plusdrive Countersunk (referred to as yellow or Euro screws) Hardened Recessed Steel Zinc Plated & Yellow Passivated Single Threaded Wood & Chipboard Screws. These screws are especially suitable for manmade board such as chipboard & MDF also most hardwoods. They will not drive as fast as Twinqwik screws but their deep sharp threads, waxed finish & sharp point give easy insertion & secure grip. The plusdrive recess makes driving easier, safer & more positive, making these screws an ideal choice for power drivers. Chippy Countersunk Head Hardened Single Thread Pozi Size 4.50 X 70 Box Quantity 200