Forgefix annular ring shank nail bright forgefix 500nlar25b these forgefix annular ring shank nails are ideal for where strength and holding power are of primary importance the rings on the shank of the nail are sloped in a conical shape to ensure clean insertion but are then extremely difficult to release they are suitable for both soft and hard wood the nails have a bright finish which is simply the basic raw mild steel material without any coating or finish used where permanent hol