Swivel cleat bases permit easy cleating and releasing from any angle.Height adjustable arm for optimum cleating angle. Twin ball bearing race minimises friction. Adjustable ratchet system prevents the arm from falling to leeward. Twin rows of ball bearings support the cleat arm, and stops are provided to limit rotation to 260° and can be removed to allow full 360° rotation.  Fork fittings have a 5mm pin to permit direct attachment to the head post of a block (ie. not using a shackle).  Suits traditional post/shackle head blocks and Dyneema® Link head Orbit Blocks™.