ROUSSEAU Mobile Work Centers are built to handle the most demanding applications! Super heavy-duty construction features 400-lb. capacity drawers that extend fully on precision ball bearings. Integral drawer lock, incorporated in the handle, provides convenient one-hand/one-step operation and locks automatically for safety during transport. Moves easily on 900-lb. capacity, 6" polyurethane non-marking casters. Model 53115 has a storage compartment for larger items.