1.length:1"-3" 2.head diameter:18mm,20mm 3..Shank:smooth twist plain 4.material:Q195,Q235 roofing nailsize: 1''-3/4''-4''Shank Dia: 13G,12G,11G,10G,9G,8GShank: twist shank ,plain shank Furface: Electro Galvanized, Hot-Dip Galvanized, Copper , Stainless Steel, Plastic Cap, Aluminium. Roofing nails can be made with a variety of types with Flat head or Umbrella Head, Diamond Point, Smooth Shank and ...