Casted uni-clips: The uni-clips are made from iron casting, they can reach required tensile strength, plain and hot-dip galv. Dogspike Features ... ,stailessstandardDIN,ANSI,BSW,AS,JS,ISO,ETC.finishbright,zinc plated,hot-dip galvanized,mechanical plated ,nickel plated,blackgrades4.8,5.8 ... rods. If any questions ,kindly let us know. Casted uni-clips