Prime-Line GD 52238 Torsion Spring Winding Rods are a critical, must-have toolfor replacing or adjusting torsion springs in residential garage doors. Thesturdy rods are constructed of cold-rolled steel to provide the necessarystrength and durability to perform torsion spring replacements and adjustmentswithout worrying about keeping the spring tension under control. Two identical1/2 inch x 16 inch torsion spring rods are included, and both are required fortorsion spring replacement. The hard-drawn wire rods are designed specificallyfor increasing (winding) and decreasing (unwinding) the tension on garage doortorsion springs, and they are the only tools recommended for this purpose.Failure to use these rods when replacing or adjusting torsion springs mayresult in personal injury and property damage. Torsion Spring Winding Rodsmake replacing and adjusting garage door springs fast, easy and economical. Itis very important to take proper safety precautions and not improvise withanother type of rod that may not fit properly or could fail under tension.These rods are sturdy, safe and the only tool you need. Note: Winding conesshould be wound and unwound 1/4 turn at a time. Not for use on winding coneslarger than 33/64′ in diameter.