The Ergotron WorkFit-D Sit-Stand Desk move from a sitting to a standing position whenever you want. Customize with accessories to fit individual user's needs and workflow. Height adjustment 20" (51cm) patented CF technology allows instantaneous, tool-free, non-motorized re-positioning while you work! Integrated brake secures table in place and with just a touch releases for height adjustment. Features a spacious 47.6x23.5" (121x60 cm) worksurface.