Harken Big Boat End Controls secure to track, eliminating additional holes. Tough one-piece bases and cam arms are machined from a single piece of aluminum.
Ball bearing sheaves let cars adjust under load and release instantly. Compact, high-strength Carbo AirBlock® components keep traveler weight minimal. Cam-Matic® cleats provide precise cleating.
Harken High-Load Controls allow 2:1 to 6:1 purchases on offshore boats with mainsails over 400 ft2 (37 m2). The Harken 3173 features 57 mm Black Magic® Big Boat ball/roller sheaves and high-load aluminum sideplates.
Part Number: 3124