These Forgefix Multipurpose Slotted Screws with raised heads have a chrome plated finish for increased durability. These screws have single threads, designed to offer higher pull-out values and quicker insertion. The screws are immensely popular and versatile, and used in all trades including joinery, electrical and plumbing. Also widely used in DIY applications. Suitable for use with many materials including PVCu, Timber, Chipboard, MDF and other similar types. Specifications Size 4.0 x 40mm Pack ForgePack of 20