Features of the DHR242Z The DHR242 tool body is separated into the upper and lower housings at the foot of handle portion where the housings are jointed with vibration absorbing cushion rubbers. Higher productivity than model DHR202 achieved by using efficient Brushless DC motor to reduce energy loss by 30% Unique rubber joint construction suppresses the transmission of vibration to battery terminals, minimizing battery failures such as terminal breakage or poor electrical contact. Able to drill in concrete as fast or faster than 24V Cordless Combination Hammer model BHR200. One touch slide chuck for SDS-plus bit. Easy-to-grip handle ergonomically designed to: give maximum power thrust. provide a sure and comfortable grip in any operation; overhead application, drilling with palm-up or palm-down grip. 3 mode operation Rotation + Hammering Hammering only Rotation only Features of the DTW300Z Brushless motor Electric brake Variable speed trigger Forward/reverse rotation LED job light Electronic 4 stage impact power selection Trigger switch with full speed mode: Variable speed mode can be changed to full speed mode simply by pushing a button. Because in full speed mode the trigger travel is shorter , the full speed is reached faster. Auto-stop system available both in forward/reverse rotation modes This Makita Combi Kit includes: DTW300Z - 18V Brushless Impact Wrench DHR242Z - 18V Brushless 24mm Rotary Hammer 2x BL1850B - 18V Li-Ion 5.0Ah Battery with Indicator DC18RC - Li-Ion Charger Makpac Case