This right-hand wound commercial torsion spring uses 0.295 wire and is built for heavier garage doors in shops, warehouses, storage facilities, and loading areas. It is meant for doors that already use a torsion spring system with 2-5/8" inside diameter options. Select the correct inside diameter, spring length and bore size so the spring matches the door and keeps it balanced. Checking the old spring specs before ordering helps avoid fitment and lifting problems.