Not tested batteries that’s with not working Introducing the Milwaukee 2441-21 M12 10 OZ. CORDLESS CAULK / ADHESIVE GUN BATT CHARGER KIT. This powerful tool is perfect for any DIY or professional automotive project. It features a 10 oz. Cordless caulk/adhesive gun with a M12 size, making it compatible with a variety of vehicles. The kit includes a batt charger, ensuring that your gun is always ready to go. The Milwaukee brand is known for its high-quality tools, and this one is no exception. Whether you’re working on your car or truck, this cordless caulk/adhesive gun will make the job easier and more efficient.