Screw Spike:1,Sold directly from factory;2,Have our own hot-dipped galvanizing production line;3,M16mm-60mm;4,accept customized. Screw Spike:1,Sold directly from factory;.2, Have our own hot-dipped galvanizing production line;3,Dia.16mm-60mm;4,accept customized;5,Stable Quality.You are very welcome to visit us! Hot Dipped Galvanized Railway Screw Spike