<p>The Bulldog BX1 coupler is the result of generations of design expertise and field experience. If incorporates innovative features that revolutionize the benefits available from a gooseneck coupler and offers flexible mounting options with its Next Generation locking plate coupler mechanism. These features combine to make hooking up, adjusting vertical height and disconnecting quick and easy. The Next Generation coupler design operates easily with one hand thanks to the new locking handle design, and maintains smooth operation over time with grease fittings for every important operating part. Coupler includes 4 inch diameter inner tube with cast locking plates and 3/4 inch load bearing pin.</p><ul><li>Provides continuous tight ball fit with ever-increasing cam tightening locking mechanism</li><li>Resists theft with integrated feature to allow pad-locking the coupler to the ball (lock not included)</li><li>Guides ball into socket more easily - bottom locking plate is 50% larger than competitors</li><li>4 adjustment holes - 8" total</li><li>Lengthens life of locking mechanism with oil-impregnated bushing and grease fittings on critical moving parts</li><li>4" inner tube only - unpainted</li></ul>WARNING: Cancer and Reproductive Harm. For more information, go to www.P65Warnings.ca.gov.