These Handyman Double Loop Closed Extension Springs by Prime-Line Products are constructed of durable spring steel, and they come finished in a beautiful, corrosive-resistant, black-painted finish. Springs like these are used primarily for wooden hinged screen door applications, and they feature a generous deflection length of 25.20 inches. These springs are easy to install and are used by many. The outside diameters, lengths, and gauge thicknesses vary between each of these springs, while their dependability does not. Use these springs for repairs around the house, in the office, vehicle, garage, and in many other applications.