The "Quick-lock" board attachment system allows you to connect and disconnect the board from the rig below the joint as well as above the joint with the base cup. The deck plate that remains on the board and is the thinnest, smallest, least obtrusive board connection in windsurfing. It has low bend point, on center, free rotating above and below the joint. It comes with the original, best tendon joint available, including 4 line safety that gets you back without damaging your board, and U.S. base cup to connect to base cup extensions.