18V Makita DHR171Z Cordless Impact DrillThe Makita hammer drill operates on the principle of direct pressure on the head of the hammer drill thanks to the action of the piston inside. This force is generated like you are hitting the hammer head on the screw, precise and focused, so it is suitable for drilling concrete, drilling deep holes on hard materials, drilling on wood, iron when combined with a rotating chuck. This is a powerful concrete drilling device, breaking walls thanks to the specialized brake ring design.