The milwaukee m28 chpx fuelsds43 hammer drill is the hardest hitting hammer in its class its powerful hammer mechanism delivers 45 joules of impact energy at low 86 ms vibrations thanks to the new dual rail anti vibration system offers four modes of operation rotary hammer hammer only rotation only and variolock for maximum versatility the high powered motor gives corded tool performance it is fitted with a milwaukee designed and built brushless powerstate motor with all metal gear case fo