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. Ref: UTTK1216