This pair of 575-WB residential garage bars from Garage Door Supply Company includes one 7/16-in. diameter bar and one bar that is 1/2 in. in diameter. Winding bars are solid rods used to adjust the tension on garage door torsion springs. We also sell replacement left wound and right wound torsion springs for residential garage doors.
- Pair (2)
- 7/16 in. + 1/2 in. diameter