Links filing & storage cabinet features include drawer fronts finished with 3mm "Tough Guard" edging providing durability and clean edges on all four sides of drawer fronts They offer full extension ball bearing slides for all drawers. Links lateral files are equipped with an inter-locking mechanism to allow one drawer opening at a time. Leveling glides are standard on all floor units. 16 standard finishes mixed into any combination, allowing for 225 possible color combinations are available.