The Barton Lazy Jack kits allow mainsails to be easily reefed and stowed by retaining the sail between lines running from the mast to the boom. These lines can be slackened while sailing to avoid restricting sail shape. Ideal for use with either fully battened or conventional mainsail. These complete kits contain plastic covered stainless steel wires with blocks, braided line and all eye straps, fastenings, etc. as well as clear fitting instructions. A unique feature is the soft plastic block covers which prevent sail chafe and enhance appearance.