Product Description Ronstan Ball Bearing Swiveling Cleat BaseFeatures: Height adjustable arm Twin ball bearing race Adjustable ratchet systemRope Ø - 1/8 - 1/2 in. (3-12 mm)M.W.L. - 570 lb. (215 kg)B. L. - 1145 lb. (430 kg)Weight - 12.1 oz. (342 g)Product InformationSwivel cleat bases permit easy cleating and releasing from any angle.Height adjustable arm for optimum cleating angle. Twin ball bearing race minimizes 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™.Applications Mainsheet systems on dinghies ad sportsboats to 8m (26ft)Materials Alloy cleating arms Fiber reinforced Nylon base Grade 316 stainless steel fittings