Low Profile; increases machine height by less than 1 Inch * Adjustable in 1 inch increments to fit most machines using side rails; expands from 14 x 14-inch to 31 x 31-inch or up to 14 x 43 inches all parts included * Foot levers engage casters for instant mobility and lower your tool onto rubber leveling feet * 400 pound capacity * 3 inch Wheels easily move your heavy machines