The Allen Mainsheet Jammer Dual Arm Swivel Small And Medium Cleat is a dual arm standard height mainsheet jammer that is ideal for both dinghies and keelboats. It is designed for central control lines, such as the vang, to be easily accessible for the mainsheet trimmer. The jammer is available with or without a 60m Pro-Ratchet Block and features a ball-locating groove for smooth rotation and preventing lateral movement. With the ability to rotate at 180, 220, or 360 degrees, the arm is highly versatile and can be adjusted to meet your needs. Additionally, the carefully optimized arm angles allow for easy cleating and uncleating of both lines. It comes equipped with a medium aluminium cam cleat with mega pro-lead on the main arm and a small aluminium cam cleat with mega pro-lead on the lower arm. The lower arm also features two sheaves to help run rope from the middle of the