All-welded construction with comfortable height as a standing desk/workstation. Riser shelf is 10” deep and 10” above desk surface. Locking storage drawer is 13”W x 17”D x 4-1/2”H and comes with two keys. Lower shelves have 1-1/2” retaining lips and 11-3/4” shelf clearance. Durable powder coated finish. Stationary Models: Leg levelers allow height adjustment of desk surface from 39”- 42” high. Mobile Models: 3” swivel brake casters with rubber wheels, 42” high desk surface.