When one of the coiled springs on my garage door broke, the new springs had to be retensioned. I picked up a 3/8" x 36" steel rod from Home Depot and cut it in half. It's also worked GREAT for taking the tension off a tensioner pulley. It's very easy to put one end of the rod on the tensioner bolt and pull against the pulley with one hand on the rod. The other hand is free to slip the belts on and off the pulley and I don't have to call for help. It worked great on my Thunderbird SC with its three belts and also on my Windstar when replacing the tensioner.