Make your Lasers vang really work.Effortless control for full-range adjustment. This is the Lower Block and Cleat Assembly only.Key FeaturesThis Block and Cleat Assembly creates a 15:1 mechanical advantage when used with suitable hardware for the top half of the purchase system (sold separately)If you need the other two blocks and the line to rig everything up, we also offer the Harken Laser Vang Upgrade kit.