... exterior upholstery/decoration, packing boxes and so on2.Surface Treatment: Polished or Galvanized3.Shrank: Smooth, Grooved, Spiral, Angular, Twist4. ... Head, Lose Head, Flat Countersunk Chequerred Head6.Finish: Polished, Electric Galvanized or Hot Dipped Galvanized7.High Quality and ... Logo Are Accepted stainelss steel 304 316 lag screw with rubber washer / stainless steel double thread rod