This High Force Retractor is a must have. Stronger, for use with heavier items like lights, computer consoles and more. Extends to 21" for ideal use. BC clip on one side for easy attachment. Split ring on the other. High impact molded case with flush holes for easy draining and cleaning. Resists marine rot and abrasion. Non-corrosive Stainless Steel spring. Extends to 21" and retracts 20 oz. A superior "dive-cessory"!