SPRINGS FOR YOUR ONE-PIECE GARAGE DOOR OR TOY HAULER SIMPLE INSTALLATION - install new or replace old, rusty springs quickly and by yourself SAFETY CONTAINMENT ROD - if and when spring breaks, the coils will remain wrapped around middle rod for protection CORROSION RESISTANT - powder coated steel coils to help slow rusting process over spring life 1-YEAR WARRANTY - springs are warranted for 1 year from purchase date The P328 28" Plug-End Garage Door Spring is a Holmes spring replacement for 7 ft. or higher one piece garage doors. Two springs are required to operate the 7 ft. one piece door. This product is perfect for DIY garage door repair.