D.I.Y. Garage Door. Safety Cable 

A garage door safety cable is a cable attached to your garage door frame at one end, and attached to your garage door springs at the other. Their purpose? To keep your garage door springs from flying around your garage and wreaking havoc if they should break. Garage door springs constantly have an immense amount of pressure on them from your garage door. They are also constantly battered by the weather, even when your garage door is closed. Unless your garage is door and the rest of your garage is well insulated and sealed, then even humidity attacks them. Garage door springs are even worn down by temperature changes. The chance that one will break is already high.