For overhead sectional wood and steel garage doors up to 7" high x 18" wide with extension springs. Also recommended for use on garage doors requiring four extension springs. Attaches between bottom lift bracket and extension spring(s) for up and down operation of garage door. Heavy duty 7 x 7 - 5/32" aircraft cable construction. One end looped and ferruled, the other end fusion cut. With a joiner clip and an "S" hook.