Milwaukee PACKOUT™ Tool Box M18™ Battery Rack Attachment provides quick and secure access to M18™ batteries on the jobsite. Designed for full customization, this rack allows users to conveniently mount up to three M18™ batteries to the exterior of their PACKOUT™ tool stack. The clip-in battery storage ensures secure placement, while the impact-resistant VO PC ABS construction delivers maximum durability in harsh conditions. Featuring secure locking onto metal-reinforced PACKOUT™ corners, this attachment is an essential addition to any modular tool storage system. It includes two Tool Box Attachment Mounts for seamless connection and is backed by a limited lifetime warranty. Model Number: 48-22-8603