Milwaukee m18 set1 403x fuel percussion drill 3 x 4ah batteries the m18 percussion drill is designed and built brushless powerstate motor for up to 10x longer motor life and up to 25 more power the redlink plus intelligence system delivers the most advanced digital overload protection for tool and battery and uniquely enhances the tool performance under load redlithium ion battery pack delivers up to 2x more run time up to 20 more power up to 2x more battery life and operates better down to