The Milwaukee Tool 48-22-8339 M18 Battery Rack is a red plastic storage solution designed for the Milwaukee M18 batteries. It features a compact design with dimensions of 4 inches in length and width, and 4.100 inches in depth. The battery rack is wall-mounted and offers a secure way to store and organize your batteries. Its connectivity with PACKOUT solutions allows for easy customization and organization, making it a convenient tool organizer for any workshop or home. The Milwaukee brand ensures durability and quality, with a 1-year manufacturer warranty included.