Shop Fox Heavy-duty Industrial Mobile Base. Simply step down on the foot lever to activate the height-adjustable leveling feet on two of the corners and your equipment is locked in place. Then when the work is done and it is time to move the equipment flip up the levers with your toe and you are easily mobile on the smooth rolling extreme-duty casters. We also placed the adjustment bolts along the edge of the adjustment bars for secure double-axis and double-contact rigidity. Heavy-duty rubber and steel casters with sealed bearings. Reinforced/welded caster posts. Adjustable positive stop/rubber leveling feet. 2 fixed casters and 2 swivel casters. Easy-float spring-loaded toe-flip lifting levers. Single-point bi-axis engagement bolts. 1200 lb. capacity. Weighs 38 lbs.. Adjusts from 19 inches x 19 inches to 29-1/2 inches x 29-1/2 inches. Specifications for Shop Fox Industrial Mobile Base: Manufacturer: Shop Fox Color: Black Weight: 38 lb Package Contents: Shop Fox Industrial Mobile Base Shop Fox D4666: Heavy-duty Industrial Mobile Base