Freestanding KI Mobile Vertical Files fit well under 27" and 29"H work surfaces. Full width pulls extend drawers 100% on heavy-duty, ball-bearing suspensions. Safety interlock system prevents more than one drawer from opening at once. Direct drive lock with removable core and tamper-proof security bars along both cabinet sides protect stored contents from theft or damage. Four swivel casters, the front 2 have brakes. Models 41868 and 41869 include fifth wheel to prevent tipping.Free Delivery in the Continental U.S.