The MILWAUKEE PACKOUT M12 Battery Rack provides the most secure mounting when paired with PACKOUT Wall Plates. The PACKOUT M12 Battery Rack features clip-in battery storage that keeps batteries securely held in place. Connectivity with all PACKOUT solutions enables you to fully customize your shop. This M12 Battery Rack is optimized to store up to 4 M12 batteries of any size. MILWAUKEE PACKOUT is the industry's most versatile and durable modular storage system.