... /twist shank 3.material:iron wire,steel wire 4.BWG9x2.5", BWG12x2" Umbrella Head Roofing Nails Anping Yuze Hardware Wire Mesh Co.,Ltd is located ... ,Singapore,HongKong,Taiwan.Galvanized Umbrella head Roofing NailsRoofing nails can be made with a variety of types with Flat head or Umbrella Head, Diamond Point, Smooth Shank ...