Drawers: High quality steel, 3 drawers with lock. Casters: 2 front casters with brake function, 1 auxiliary caster under file drawer prevents tipping Drawer Interlocking Mechanism: Allows only one drawer opened at one time and keeps the other drawers closed for safety purpose. Privacy Protection: One key locks all three drawers to protect privacy. Dimensions & Details Items Included: 5 Casters, 1 Keys, 1 Instruction Casters: 2 Front Locking Casters, 1 Auxiliary Caster Drawers: 3 Drawers with Lock Material: Steel Product Size (cm): 60 * 39 *52 Package Size (cm): 61.5 * 45* 58 Net Weight (kg): 19.2 Gross Weight (kg): 23.2.