Use this steel right-hand wound torsion spring to replace broken garage door springs of matching dimensions. It includes mounted stationary and winding cones with .243” wire size x 1-3/4” inside dimension x 32” length with red color code. This torsion spring is a regular duty spring with an estimated lifetime rating of 10,000 cycles. These types of torsion springs provide lifting force for heavy garage doors and must be selected by the spring’s dimensions, rather than the door’s weight. See the product specifications with illustrations found in Prime-Line’s Torsion Spring Selection Guide to ensure that the proper replacement spring has been selected. As an important safety precaution: all broken or malfunctioning hardware should be replaced with matching hardware, without any modifications. These garage door torsion springs can cause serious injury if not handled and installed properly. If attempting to replace the torsion springs yourself, it is important that the removal or adjustment of torsion springs is not attempted with any other tool other than Prime-Line’s item number GD-52238. Failure to utilize Prime-Line’s item number GD-52238 for the replacement of these springs may result in severe personal injury. These winding rods are used to wind and unwind the tension on torsion springs and they are the only tools recommended for this purpose. Two winding rods are required for torsion spring replacement. When dual spring installations are involved, it is important to correctly install both the left and right-wind springs during the same job. In the case of dual spring installations, note that proper use of LEFT-WIND and RIGHT-WIND springs is imperative. When dual spring installations are involved and only one breaks, it is important to replace both springs, as replacing only one spring may add increased strain to the older non-replaced spring. Note: To determine the handing of your torsion spring wind, look at the end of the spring with the “finger” of the spring at the top of the wind. When the end of the spring is at 12:00 o'clock and it is pointing to the left, the spring is a right wind; if the end of the spring points to right (positioned at 12:00 o'clock) it is a left wind. When standing inside the garage looking outside, the torsion spring with the black painted winding cone installs on the right side of the door, and the torsion spring with the red painted winding cone installs on the left side of the door.