The unique patented Velocity screw has been specifically designed to give rapid installation into many different materials, whilst achieving exceptional pull-out resistance. It has been designed to give the user a consistent and reliable product that can be used in a variety of applications. Driver Bit Size: PZ2, Finish: Zinc & Yellow, Gauge: 9, Head Dia. mm: 8.76, Head Type: Double Countersunk with Ribs, Inner Thread Dia. mm: 2.8, Length inch: 2, Length mm: 70, Lubrication: Wax, Material: Carbon Steel, Pack Dimensions L x W x H mm: 135 x 90 x 90, Pack Weight kg: 1.010, Point Type: Single Slash, Product Code: 45070VY, Recess Type: Pozi, Shank Type: Rapid Drive Twist, Size imp.: 9 x 2, Size mm: 4.5 x 70, Substrates: Hardwood, Softwood, Chipboard, MDF, Plastic, Thin Sheet Metal, Thread Dia. mm: 4.5, Thread Length mm: 40, Thread Type: Serrated Dual Angle.