Stick nails to suit the hitachi nr90 gc2 clipped head framing nailers profile options ring or smooth shank ring shank ring shank nails have a series of rings punched into the surface of the shank a difference in the diameter of the shank is produced making it even more difficult to withdraw the nail ring shank nails have to be produced at lower speeds and their cost is generally higher than for a smooth shank nail the air consumption per nail is also higher and the energy required to drive these