Gate Springs are now available in 304 series stainless steel! Gate Springs are also powder coated for a long-lasting finish. Use these gate springs on practically any type of gate or door, i.e. wood, aluminum, ornamental iron, and steel. Gate springs are installed on the gate hinge post and gate vertical upright with stainless steel screws (provided). Use with hinges which are not self-closing or use in conjunction with self-closing gates for extra support. Gate spring tension is adjustable.