Please choose the correct ending to complete the given sentence: Home and Garden: [header] How to adjust a garage door spring [title] Recognize side-mounted extension springs. [step] There are two kinds of springs your garage door might use: side-mounted extension springs or torsion springs. Before you can adjust the spring on your garage door, you must determine what kind of springs your door has.

Ending1: [substeps] Side-mounted extension springs are larger than torsion springs. Torsion springs refer to the way the door is mounted. Ending2: [substeps] Side-mounted extension springs can allow easy installation to a new door if you are unsure how to attach one. Torsion springs are similar but have triangular openings from which to attach the spring. Ending3: Side-mounted springs are easier to adjust, while torsion springs are more dangerous to meddle with, so you would be better off calling a professional if you have these. [substeps] Side-mounted extension springs run above and parallel to the door track, and they'll have an attached pulley and cable. Ending4: [substeps] Side-mounted spring springs are also known as " folded springs. " the springs are usually used to secure a door latch so that it will not move when the door opens.

Answer format: ending1/ending2/ending3/ending4