The Extend-A-Line is designed to be mounted to 1" or 1-1/2" exterior ladders with 9-5/8" - 10-1/8" spacing between upright tubing. Can also be wall mounted for home use, or RVs without ladders. Six independent arms carry towels, suits, or clothes on hangers Supports 10 lbs per arm, 60 lbs maximum load when evenly spaced 17' of line space Chrome plated arms and a plastic body resist rust Nylon storage bag provided for travel