Pozi Screws & Brown Raw Wall Plugs Pack of 100 Pozi head twin thread countersunk screws. Bright zinc plated BZP. Screw size: 4.2 x 51mm. Interior and exterior use. Ideal for all types of tradesmen.Contents: 100 x Brown Plugs - Drill size 7mm. 100 x Pozi screws 4.2 x 51mm.