Bulldog 195356 - Square Tube Trailer Jack - 5,000 lbBULLDOG's 5,000 lb support capacity square jack dramatically improves side load strength while maintaining the economical benefits of lower capacity jacks. These jacks provide the extra side load capacity you need without the costs of increasing overall capacity. 12 gauge square tube is 70% stronger than 12 gauge round tube for more side load and support strength with the same lift capacity 4. 62" outer tube overlap at full extension for additional