This heavy-duty side bracket is a great choice for mounting the upper unit atop the base unit of your 20th century Boone, McDougall, or other Hoosier-style cabinet. It provides the clearance needed to allow the work top to easily slide in-and-out between the two sections, and the heavy-gauge steel construction delivers long lasting quality and performance. Note: the vertical clearance denotes the space between the two units, while the side clearance denotes the distance a work top can exceed the cabinet's side.