CURT 48651 SecureLatch Lunette Ring Channel, 2 3 4 I.D., 11 3 4 Inch High coupler and the SecureLatch mechanism automatically 4085 and the SecureLatch mechanism automatically engages the primary lock For use with certain CURT round bar weight distribution hitches Adjustable design compatible with all CURT replacement WD shanks Constructed from solid steel for reliable strength Protected by a highly durable carbide powder coat finish Features built in sway control attachment tabs The CURT SecureLatch channel is designed to mount a lunette ring onto your trailer and provide integrated height adjustment for level towing Mounts any CURT SecureLatch channel style lunette ring (sold separately) Four position height adjustment allows for precise trailer leveling 2" bolt pattern spread for simple