General® International Universal Mobile Base is size-adjustable to your shop tools in 1" (2.5 cm) increments Includes 2 heavy-duty 3" (762 mm) wheels, 2 heavy-duty 2.5" (63.5 mm) swivel casters, lockable by foot pedal and 2 rubber leveling feet Load capacity: 500 lbs (227 kg) Min. square: 11 x 11", max. square: 35.25" x 35.25", min. rectangular: 17 x 11", max. rectangular: 51 x 19" $95