These forgefix hammer fixings include both plug and pozi head screw the plug is made from nylon for a longer life and durability and the anti rotation barbs prevent the plug from rotating in the hole the fixings are through fixing eliminating the need for marking and re positioning to use simply drill through both fixture and into the base material and tap in the hammer fixing with a strong blow to complete the fix and ensure full expansion the screw can be released if required applicationwidely