Features. * User movable with finger trigger clamp * Fabric covered magnetic surface * 8 overhang * Fits on any worksurface 3/4 to 1-1/2 thick ( 0) 4 leg Mobile Locking Headrest ( 0) 4 leg Stacking ( 0) All mesh chair, synchro mechanism w/ seat depth adjustment, 2-position back lock, 3-way adjustable arm ( 0) Height-Adjustable, 4-memory preset