High-quality jacks with bolt-through or retaining wheel swivel mountsFactory-assembled mounting bracket provides for quick-and-easy trailer installationHeavy-gauge steel stampings and proprietary bushing material for maximum support with minimal deflectionFits trailer tongues up to 7.62cm x 12.7cm (3" x 5")1:1 sidewind gear ratio makes operation simple25.4cm (10") of screw travel; total lift of 57.78cm (22.75")Constructed of heavy-duty zinc-plated steel tubing with 15.24cm (6") reinforced poly wheel; 680kg (1,500-lb.) swivel jack features an 20.32cm (8") wheelMade in the U.S.A.