Wobbly workbenches and machine stands usually come down to uneven floor contact, and this set of four leveling casters fixes that with an easy-twist handle that adjusts each wheel's height independently for a solid, even setup on floors that aren't perfectly flat. Rubber padding under a solid carbon steel top plate absorbs vibration during operation, and the 360-degree swivel lets loaded equipment roll and reposition smoothly instead of dragging. Once you're ready to stop, a retractable non-slip support base lowers to the ground so the load rests on a stable foot rather than the wheel, keeping heavy machinery from creeping during use. Built with an aluminum bracket and 2.5-inch nylon wheels, the set carries up to 2200 lbs combined, enough for storage racks, workbenches, rolling tool boxes, carts, cabinets, and even gate hardware. At 4.82 x 3.54 x 4.01 inches and about 11 lbs for the set, they install as a drop-in replacement for fixed feet on furniture or equipment that needs occasional mobility.