Counterweight included, where applicable, to meet ANSI/BIFMA stability requirements. Lock secures both sides of drawer and heavy-duty, three-part, telescoping, steel ball bearing suspension offers smooth drawer operation. Mechanical interlock allows only one drawer to be open at a time to inhibit tipping. Four adjustable leveling glides help compensate for uneven flooring. Drawers include side-to-side hang-rails for letter or legal size filing and bright, anodized aluminum recessed drawer pulls. HON® "One Key" interchangeable core removable locks. Four-Drawer/One-Shelf Format—Four standard file drawers with one receding-door-enclosed, roll-out file shelf on top. Number of Drawers: 4; Drawer Configuration: File; Anti-Tip Mechanism Indicator: Yes; Anti-Tip Mechanism: Counterweight; Mechanical Interlock.