Industrial Milton design coupler plug. This plug design is considered the industrial standard. Can be identified by the 3/16 In. pilot and flat bottom V-shaped ball groove. Conforms to ANSI (NFPA) T3.20.14-1990 dimensions.
Sectional door extension spring has double loop ends. Replaces most spring configurations on residential doors that are no higher than 7 feet. Includes a galvanized carbon steel aircraft cable.