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 softwood and hardwood The nails have a Bright finish which is simply the basic raw mild steel material without any coating or finish APPLICATION Used where permanent holding is preferred such as flooring applications