The Allen Compact Mainsheet Jammer Arm with Swivel And Cleat is the perfect solution for dinghies and keelboats that need a central jammer with a smaller size and lower cleat. Choose between the option of a 60m Pro-Ratchet Block or without. This mainsheet jammer features a cold forged bearing system with a ball-locating groove for smooth rotation and preventing lateral arm movement. With the ability to adjust the stopper pins, the arm can rotate at 180, 220, or 360 degrees. The angle of the jammer arm has been expertly optimized for easy cleating and uncleating, while also including an aluminium cam cleat with mega pro-lead for added convenience.