2” grommet in bottom shelf for wire management. Monitor shelf wire in back of shelf for easy access of wiring between upper and lower portions, wire drop gap. 4 heavy-duty 5” casters, 2 locking. Cabinet supports 150 lbs. Roll out keyboard shelf 20”W x 15-1/2”D x 2”H drawer. Flip down drawer front. Fan included. Full rear locking door for easy access. Upper locking compartment, acrylic window with cam lock for security. Upper locking compartment interior is 25-3/4” x 22-3/4” x 23-3/4”. Opening clearance is 22”W x 19-3/4”H. Accommodates flat panel monitors up to 25”. Tilt flat panel stand comes attached. Lower locking compartment with 1 adjustable pull out printer shelf that adjusts on 2” centers is 21” x 23” x 24-1⁄2”.