Harken, Inc. is a leading manufacturer and marketer of quality marine and sailboat hardware and accessories. Buy Harken hardware such as blocks, winches, travelers, mainsail & headsail systems, and a full range of hydraulic products and services for your boat.Harken.Harken Classic Small Boat Blocks are strong, dependable, and exceptionally free running. Small Boat Classic blocks are exceptionally free-running and can be used for sheets, halyards, and control lines on dinghies and smaller keelboats, as well as for lightweight control lines on boats of all different sizes. Small Boat Classic blocks are ideal sailboat hardware for almost every trimming task.These blocks are the foundation of the Harken line, with a vast library of hardware choices available to compliment your boat's style. Harken Classic Blocks come in multiple sizes, dozens fo configurations and are ideal for almost every trimming task.Black Magic Blocks are tough, lightweight blocks that have free-rolling high-load Torlon roller bearings that gives it have a high strength-to-weight ratio. Used for sail controls that go through many actions: mainsheet, halyard, runner, and spinnaker systems. Used on offshore boats, the roller is housed in a center cage and stays parallel for a low-friction effectiveness. Available in 57, 75, 100, 125, 150mm editions.Bullet blocks are made to be low-friction and lead control lines aft. They are made to be compact and light, with a fast trim and release under high or low loads. Comes in different styles like dinghy, or big to fit different kinds of boats.Harken Carbo Blocks.Harken Carbo Air Blocks are built to be light and strong against all different weather conditions while still being affordable. They are similar to the Harken Black Magic block line, but are compact blocks with high working loads for easy trimming. They have sideplates of high-strength engineering resin that are UV-stabilized to provide excellent protection against long-term exposure to saltwater and sunrays. Harken Carbo Blocks are perfect for the small-diameter hard lines favored by racers.Harken 29mm Carbo AirBlocks29mm Carbo – The compact 29mm Carbo block is made to be strong. Can be used as a mainsheet block on small dinghies, or just a low-friction control blocks on any boat size. The doubles and triples features the U-locks to hold in the swivel in a front/side position or be able to spin freely.Harken 40mm Carbo AirBlocks.Made to be 60% stronger and 30% lighter than the classic Harken blocks. Made to be used for jib and mainsheet systems on high performing dinghies and loaded control lines on small keelboats. There are nylon-resin sideplates that are densely packed with long-glass fibers for a compact block with a high strength-to-weight ratio.Harken 57mm Carbo AirBlocks Are made to be high-load and have a large range to be used for. They can be used for main and jib sheets on centerboards and keelboats like: Lightnings, Dragons, Solings, and J/24s, and mainsheet systems on catamarans. These blocks feature Cam or U-lock locking systems to lock the shackle in the front and side.Harken 75mm Carbo AirBlocks.Created with a safe working load of 1200 Ib. (500 kg.) It can be released easily while under load and made perfect for mainsheet systems on sport boats. These blocks feature Cam or U-lock locking systems to lock the shackle in the front/side, or to be able to swivel to keep the line from twisting.Harken Multihull Blocks.Built to help you trim and stop from getting overpowered on multihulled boats, Harken has designed the multiple sheaved solutions to help you get your sail-in as needed. Pair up selections to create a purchase system with ratchets or camcleats as needed.Harken ESP Cruising Blocks.Cruising blocks are made to look like other Harken blocks, but made to be easier to use. The sheaves feature sleeve bearings to handle high static loads and ideal for halyards or limited purchase systems on cruising boats. These blocks still are designed and made with the classic Harken quality.Teardrops are built to be used for direct attachment to padeyes, mast collar posts, perforated mast collars, or in mastbase situations where the leads could change.Harken Aluminum MegaYacht Blocks.Harken Aluminum Megayacht Blocks have the clean, crisp look of aluminum that's perfect for performance-oriented yachts. Sideplates are constructed of hardcoat-annodized 6061-T6 aluminum for strength and corrosion resistance. The ultralight composite bearing system rides on heat-treated stainless steel inner race to handle extremely high loads.