The National Nail Furring Steel Nails apply stucco wire mesh to the exterior of the structure before applying stucco mud. These furring nails are electro-galvanized to resist rust and corrosion, and the barbed shank offers greater holding power. The diamond point tip of the nails allows easier driving. The wad on the nails creates space for the stucco mud to adhere to the surface properly around the nail. They have a smooth shank to make installation easier.