The two types of springs used on garage doors today are extension and torsion springs. Extension springs are attached on either side of the door and stretch along the horizontal track when the door is closed. Torsion springs are typically located just above the top section of the door and are mounted to the header. They are wound springs and do not expand or contract when the door is moved. Torsion springs are a better choice because they balance the weight of the door better than extension springs for smoother operation and safety.