When choosing a trailer jack, it's crucial to be sure you've picked the right equipment for your needs. Our Bulldog Round Jacks offer you proven performance for supporting lighter loads during coupling and uncoupling and for stationary support. BULLDOG round jacks are recognized as the industry standard by leading agricultural, commercial, horse, livestock, and other trailer manufacturers. For more than three quarters of a century, BULLDOG jacks have been demonstrated to be the most reliable, field-proven jacks on the market. Image is for reference only - may not be exact color or configuration of actual product.