Roofing coil nail The type of shank: smooth, ring Finish: polished, vinyl, E.G., HDG,mechanical plating lenghth: 3/4"-1-3/4 ... "The type of shank: smooth and threadFinish: polished, vinyl, E.G., HDGPackage:colorful paiting, tightly and proper cartonMaterial:Q195, Q235Roofing coiled ... to chat with me on line by Tradermanger and msn, I would do our best to help you.