These hammer fixings are ideal for a range of DIY projects around your home. They're great for use with brickwork, blockwork, stone and concrete. The Fischer N-S nail plug with countersunk head consists of a high-quality nylon plug and a galvanized nail screw. These are pre-assembled for quick assembly. The fixing plug is inserted through the attachment in the time-saving through-hole mounting. When driving in the nail screw the dowel sleeve expands and anchors securely in the building material. The Fischer N-S nail plug with countersunk head is Ideal for fixing wood construction in all internal materials.