Heavy Premium Quality Ball Bearing Slides Hardware Accessories Used in Filing Cabinet for Smooth Drawer Movements That Open & Close Quickly and Easily. Self-Balancing Mechanism Makes Storage Cabinet Drawer Operating Simple & Very Smoothly. Steel Bearing Are Riveted in Organizer Drawer Storage for Longer Life. In Filing Cabinet Central Locking System with Chrome Plated Heavy Duty Lock to Keep Your High-Security Documents or File Safe. Export Quality Packaging Material We Used in Drawer File Cabinet. So There Are No Chances of Receiving Any Damaged Product. 4 Drawer File Cabinet Can Easily Hold Up to Maximum 13 Box File Stored in 1 Drawer. If Normal A4 Size Spring File, then 28 Spring File Easily Stored in 1 Drawer of File Storage Cabinet. Overall in 1 Drawer Lockable File Cabinet Can Holds Up to 13 To 28 Files Depends Upon Types of File. This Whole 4 Drawer Metal File Cabinet Can Totally Holds Maximum 52 to 112 Files Depends Upon Types of File.