Milwaukee M18 3.0ah High Output Introducing our STS Auto Design M18 Hi Output 3.0Ah Magnetic Battery Cover – the ultimate solution for secure and efficient tool storage..4 100lb Magnetic Cover Design: Our innovative magnetic cover design ensures a strong and secure hold for your STS Auto Design M18 Hi Output 3.0Ah batteries, keeping them in place wherever you go. .This unit will hold up heavy 1/2 impact guns and keep them in place where you want them to be secured!*BATTERY NOT INCLUDED* MW1830HOR