Ball Bearing Swivelling Cam Cleat Base. Swivel cleat bases permit easy cleating and releasing from any angle.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. The rotation stop on the cleat arm moulded cleat arm cradle part can be cut off 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#153,Features: Height adjustable arm, Twin ball bearing race, Adjustable ratchet system , Applications: Mainsheet systems on dinghies and sportboats to 8M(26′), Materials: Alloy cleating arms, Fiber reinforced Nylon base, Grade 316 stainless steel fittings.