P342 42 in. Plug-End Garage Door Spring (0.244 in. No. 3 Wire), E900 Hardware, Mfr#: P342

The P342 42 in. Plug-End Extension Spring is a Holmes spring replacement for heavier 1-piece garage doors as well as for toy haulers using lift springs. Replace all springs at the same time for balanced door lift and even wear. A c-hook is required for a single spring installation while a w-hook is required for a double spring installation available separately.