The Milwaukee Vertical E-Track (48-22-8482) is for use with PACKOUT Racking Shelves and features a powder-coated finish to resist rust and corrosion. Its heavy-duty steel construction is ideal for you to mount in vans, trucks, trailers, and shops and is compatible with all E-track accessories. Each E-Track has five slots for versatility. The MILWAUKEE PACKOUT Modular Storage System is the industry's most durable and versatile storage system.