The Milwaukee M12CH-0 12v Compact SDS Rotary Hammer Drill is an industry first brushless compact 12V rotary hammer with 1.1 Joules (EPTA), 0 – 6575 bpm & 0 – 900 rpm. featuring a flexible battery system: works with all Milwaukee M12™ REDLITHIUM-ION™ batteries. Superior power to weight ratio in its class with Milwaukee designed and built brushless POWERSTATE™ motor for up to 3x longer motor life and up to 2x more run time.