Lazy Jacks control the mainsail when reefing or dousing, and easily tame today s mainsails, whether full-battened or conventional type. Schaefer s Lazy Jacks funnel the sail down to the boom and retain it, keeping you safe in the cockpit and allowing you to properly secure the sail when you are moored. They allow for the use of an existing sailcover without the need for extensive modifications. Thimbled eyestraps attached to the bottom of your boom keep the hardware away from the cover and enable you to tuck your sailcover under the lazy jack control lines. Includes fasteners, eye straps, jam cleat, lashing eye blocks with elkhide chafe guards, vinyl-coated wire, cheek blocks and Dacron double braid with eye splices.