These fixings come in bags of 25 or trade boxes of 100. The plugs are zinc alloy with a deep coarse thread, which makes them easy to fit and for a strong grip. A specially designed cutting tip pierces the plasterboard skin, no pre-drilling required. They come complete with 4.5mm Pozi headed screws. If at any time the fixture needs removing temporarily, the plug stays in place rather than dropping into the cavity. The countersunk head of the plug allows flush fitting of the screw to the plasterboard.