Full drawer extension on genuine progressive telescoping ball-bearing slides provide smooth, trouble-free operation. Built-in drawer interlock system prevents more than one drawer from opening at a time, reducing the chance of cabinet tip over. Center lock securely locks both sides of each drawer for positive security (two keys provided). Adjustable leg levelers keep cabinets level in any environment. Extra deep drawer accommodates letter or legal size files using side to side hanging rails. Powder coat finish. Rolled or hemmed edge drawer sides for strength, rigidity & safety. ANSI/BIFMA Rated. All steel full width drawer pulls featuring double wall reinforced drawer fronts for extra stability