This left wound garage door torsion spring in a .243 in. by 2 in. by 27 1/2-in. size from Garage Door Supply Company will replace a worn or damaged torsion spring on your garage door that is the same size. Consult your owner's manual to confirm torsion spring sizes, or contact our family-owned company headquarters for free help. If you have two torsion springs, they likely will wear out at about the same time, so consider ordering both at once. We also carry numerous sizes in right wound garage door torsion springs.