This anti-tilt and anti rattle device fits any Class 3 or class 4 vehicle hitch that has a 2" x 2" opening.  Use to eliminate rattling of your ball mount and rocking of your hitch mounted carrier or bike rack. The 3-bolt mounting properly installed causes the ball mount or hitch accessory to hold solid to the main tube of rack to trailer hitch to eliminate wobble and rattling. Zinc coated for corrosion resistance.