The Centurion Twin Thread Woodscrews are versatile zinc-plated fasteners designed for superior performance in various materials including softwoods, hardwoods, chipboards and fibreboards. These 1½ inch x 10 screws feature an extra deep insert bit recess for positive drive engagement and twin thread technology that enhances insertion speed and holding power. The countersunk head design ensures a flush finish with the substrate surface, while the zinc plating provides excellent corrosion resistance.