Are you having trouble sliding your screen door open or closed? Have you checked your rollers/roller assemblies? Don’t replace the entire door. For a fraction of the cost of a new door, replace those worn-out rollers. This is a tension spring roller assembly with an offset, or bent, spring design used by Academy, Metal Industries and a variety of other patio door manufacturers. The roller is a 1 Inch diameter steel ball bearing roller with a tension spring that is a heat treated steel spring. The bent, or angled flat spring installs into the screen door frame so that the roller assembly cushions the door as it rides back and forth. For high density polyethylene rollers use Prime-Line part B 609. Order yours today and have your door slide like new.