The photo of the printer stand shows castors underneath.  The stand however, cannot accommodate the castors. To do so requires that a nut be slipped under metal tab.  The metal tab is too close to the underside of the printer stand and does not allow the nut to be slide underneath.  Thus, there is no attachment point to accommodate the screw attached to the the castor wheels.  Further, even if the nut could be slide under the tab, the mouth of the tiny wrench (supplied) is way too big to grab the nut.  Buyer beware.