Forney 72583 Wire Spring Extension (10-301), 1-1/2-Inch-by-11-1/2-Inch-by-.135-Inch Used in light industry such as screen doors, chaise lounges, toys 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