Our LeeLock #SP-01 1/2 Inch Side Pull Lock Unit bolts onto the tray. This patented unit gives you a much easier and safer way to secure your anchor line and eliminates the need for a traditional jam cleat. Best of all it prevents accidental anchor release!It is constructed of 1/4 aluminum. This lock is designed to be used with most 3/8 to 1/2 anchor lines. It is supplied with 2 mounting hole patterns to ensure it will fit your boat. Use 1/4 fasteners (stainless steel recommended, not included) to mount.Hassle free, reliable and easy!