The Allen Mainsheet Jammer Arm with Swivel Cleat And Block - A2160 offers a standard height option suitable for dinghies and keelboats that need a central jammer. This product comes with the option of a 60m Pro-Ratchet Block and features a cold forged bearing system for smooth rotation and stability. With adjustable stopper pins, the arm can rotate at 180, 220, or 360 degrees. The carefully optimized angle of the jammer arm allows for easy and efficient cleating and uncleating, along with an included aluminium cam cleat and mega pro-lead for added convenience.