Hammond SDC243U17BK 3RU 24 Inch Width 17.5D Multi-Use rack cabinet. Includes vented non-removable side panels, adjustable square hole rails, removable top cover and side handles. For use as a wall-mount, ceiling mount, freestanding with or without casters. The SDC Series is a multi-use rack providing numerous options for equipment rack mounting. It is ideal for securing rack-mount equipment in spaces where room for a traditional rack or cabinet is limited or not available. The modular design includes a body with numerous accessory options to suit your unique application.