Used to wind and unwind the tension on torsion springs and are the only tools recommended for this purpose;1/2 in. x 16 in.;Not for use on winding cones larger than 33/64 inches in diameter;Constructed of steel

• Prime-Line Products GD 52238 Torsion Spring Winding Rods, 1/2 in. x 16 in., Steel, Round
• Granite

Prime-Line Products GD 52238 Torsion Spring Winding Rods, 1/2 in. x 16 in., Steel, RoundJensen (Home Improvement)