Harken Power3 - 57 mm Ratchamatic Block, Swivel - 3/8" Line, 500 Lb. Work Load - Standard Grip, Black Tip Top Teak compatible with Navisafe’s Navimount system

compatible with Navisafe’s Navimount system and many GoPro® / Action camera mounts

Made using the highest strength materials and the most advanced manufacturing processes

and other machinery

or on the bottoms of racing craft that are dry sailed

Harken Premium Bosun's Chair

Harken Power3 - 57 mm Ratchamatic Block, Swivel - 3/8" Line, 500 Lb. Work Load - Standard Grip, Black Tip Top Teak compatible with Navisafe’s Navimount systemThese unique load sensing blocks shift seamlessly between ratchet and light air modes with no switches involved. They roll freely in both directions under low loads, but automatically engage the ratchet assist under higher loads. Best of all, the ratchet engagement point is adjustable to suit your muscle power and sailing style. Features Perfect for main jib sheets and asymmetric spinnakers Adjustable ratchet engagement Free release under light load