Blaylock TL-33 Coupler Lock For commercial and recreational use Fits over 30 different coupler style brands. Covers brands & styles of receivers including Buyers, Atwood, Fulton, U-Haul, Pro-Series, Titan, Demco to name a few. Crafted with pride in the United States of the highest grade aircraft aluminum Fits 2" and 2-5/16" couplers, Three hole positions for multiple coupler applications. Read product description below for more information