A pack of 100 Vortex High-Performance Multi-Purpose Woodscrews 6.0mm x 80mm. Vortex woodscrews can be used in hardwood, softwood, chipboard, plywood, MDF, PVCu and thin sheet metal. These woodscrews have a recessed double countersunk head to give a countersink flush finish, whilst providing greater strength. Vortex zinc and yellow finish screws have a sharp, wide and deep thread featuring ‘Saw Fix’ serrated thread technology to provide more bite and better grip allowing the screw to be driven into wood quickly and easily.