Forgefix cavity wall anchor zp forgefix 10mca420 these forgefix cavity wall anchors are a specialist plasterboard fixing with pozi and slotted combination drive insert they have an all metal construction for applications which require heat resistance and are zinc plated for increased resistance to corrosion the anchors have anti rotation teeth which pierce the base plasterboard skin to ensure firm anchorage all metal construction means the anchors are suitable for the heavier duty tasks s