The standard cycle life for a torsion spring on a garage door is 10,000 cycles. That equals to about 3 to 5 years. Your garage door spring is just one big metal coil.  That means that they are susceptible to breaking over time. Garage door springs may break for a few reasons, including age and rusting. Another common reason is extreme heat or cold can also stress the springs to the point of breaking. Whatever the reason is, a broken spring can make your garage door inoperable. Replacing your own garage door springs can be dangerous if you do not have the proper tools or experience to do so. One of those tools is a winding bar. A winding bar helps unwind and wine up the garage door spring. Some homeowners use things like screwdrivers, that can shoot out and cause harm to themselves or damage property. Instead, trust the garage door spring experts at Stateline Garage Door LLC.