Milwaukee m12 ch 0c fuel sds hammer 12 volt bare unit no battery or charger milwaukee m12 ch 402c fuel sds hammer offers superior power to weight ratio in its class with milwaukee designed and built brushless powerstate motor for up to three times longer motor life and up to two times more power redlink plus intelligence system delivers the most advanced digital overload protection for tool and battery and uniquely enhances the tool performance under load has 2 modes of operation rotary