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. Smooth, comfortable, ergonomic design Dependable vertical and side load capacity Proven reliability for long term use at rated loads Precision fitted parts for extra stability 3 Year Limited Warranty