Garage Door Extension Springs Sizing. I did too until an extension spring almost took my head off. Garage door extension springs counterbalance the weight of garage doors to make them easy to open and close.
Garage door springs are specially manufactured for different size doors.
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Garage Door Spring Repair in Broward, Palm Beach & Martin County. You think your garage door is safe. If long life springs are available in the sizes you need the option will appear with part numbers ending in "LL" in the in the list that appears after entering information in the drawdown.