Dyna-Tite Cable Locks are a fast and reliable way to suspend ductwork and equipment. All cable locks are designed for use with one specific wire size and have working load ranges that incorporate a 5:1 safety factor ratio. For ease of installation Dyna-Tite cable locks feature an easy release pin for simple adjustments without the use of tools. Duro Dyne® Cable Lock, Accessory Type: Cable Lock, For Use With: WC4-CL18 Wire Rope, Steel, Import