Counterweight included, where applicable, to meet ANSI/BIFMA stability requirements. Lock secures both sides of drawer. Heavy-duty, three-part, telescoping, steel ball bearing suspension for 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. Bright, anodized aluminum recessed drawer pulls. HON® "One Key" interchangeable core removable locks.