The Milwaukee Packout Tool Box M18 Battery Rack Attachment is a convenient and durable storage organizer specifically designed for Milwaukee M18 batteries. With a height of 11.77 inches and a weight of 1.8 pounds, this tool storage organizer is compact and lightweight, making it easy to transport and store. The built-in battery included feature ensures that your batteries are always ready to go when you need them. The manufacturer part number 48-22-8603 and SKU 48-22-8603 indicate that this product is a reliable and high-quality accessory for your tool storage needs.