The OEM Bankers Box Stor/File is designed for medium-duty storage of inactive letter-size files, suitable for use with or without shelving units. Its FastFold One Step Setup allows for quick and easy assembly. This maximum security box features a string-and-button closure to keep contents secure, even if the box is overturned. It can be stacked up to five units high, safely supporting an average of 500 lb of evenly distributed weight on top.