Stand-up workstation changes tall from 35" to 49". Created for stand-up computer work. Keyboard tray extends 9-3/4" and retracts under the worksurface when not used. Keyboard tray can hold as many as 25 lb. The desktop can hold as many as 100 lb. Design has a heavy-duty steel frame with powder-coat surface, 3/4" compressed timber shelves, and snap-on cable managing edge covers. Worksurface actions 29-1/2" wide x 19-3/4" deep, and computer keyboard shelf is 22-3/4" wide x 13-1/2" deeply. Roll stand-up workstation effortlessly on four casters (two locking).