The Milwaukee PACKOUT M18 Battery Rack (48-22-8339) delivers the most secure mounting when paired with PACKOUT Wall Plates, strongly holding the PACKOUT solution mounted to the wall. This Battery Rack features clip-in battery storage to keep your batteries securely held in place and is optimized to store up to four M18 batteries of any size. Additionally, our Battery Rack features connectivity with PACKOUT solutions, allowing you to fully customize your shop.  Milwaukee PACKOUT is the industry's most versatile and durable modular storage system.