BUILT FOR MARINE & UTILITY TRAILERS: FULTON tongue jacks are time-tested and application-proven, ideal for a wide range of trailer types. EASY INSTALLATION OPTIONS: Choose from bolt-on models with included hardware or weld-on mounts compatible with 1/2″ and 3/8″ pull pin designs. HEAVY-DUTY SWIVEL MOUNTS: U.S. PAT. 6,302,381 bolt-thru swivel mounts feature 3-D formed heavy-gauge steel and proprietary bushings for superior stability. VERSATILE FIT & DESIGN: Fits trailer frames up to 3″ x 5″ with sidewind crank options and round or square tube models to suit your needs. POWERFUL & RELIABLE PERFORMANCE: Lift capacities range from 400 lbs. to 5,000 lbs., with strong materials and a dependable, durable design.