Forney 72533 Wire Spring Extension, 7/16-Inch-by-3-1/2-Inch-by-.054-Inch, 2-Pack Used in light industry Zinc plated steel wire extension spring Baked for a rust resistant finish and heat treated for performance and longevity Ideal for a wide variety of uses in homes, the shop, on the farm or ranch, small businesses Used in screen doors, chaise lounges, toys, lawn and garden equipment and industrial