Supplied in bags of 10, these Forgefix Cavity Wall Anchors are strong plasterboard fixings. Each insert comes with an M4 x 45mm long machine screw with a combination Pozi/slotted head (saves time hunting for the right screwdriver). The all-metal construction makes them suitable for applications which require heat resistance. They are zinc plated for resistance to corrosion. The anchors have anti-rotation teeth, which pierce the base plasterboard skin ensuring a firm anchorage and preventing the fixing from turning when tightening the screw.