I was looking for a drawer for a printer. Ordered these came very quickly thought and worked perfectly. Mounted upside down on the underside of the stained ebony, then pulled out and screwed into the rail at the top of the drawer. 18 inches was the perfect length for a closet. You can now pull out the printer and place items to copy or scan. The seat is right next to the table and the screen, which is much more convenient and frees up table space. Very happy with the result of the project!