The Onyx mountable storage unit features two compartments, one removable accessory tray and one built-in writing utensil tray for a variety of office supplies and accessories. Mount this unit to the underside of any work surface that can be drilled into (thicker than .75”) using the four screws provided. The sturdy steel mesh construction and scratch-resistant matte black powder coated finish offers long-lasting durability and efficient organization for home, office or in the classroom.