1) Compact design ? best grip  <br><br>2) Quick replacement of the chuck means? without any tools  <br><br>3) Suitable for drilling ? grinding? polishing? cutting  <br><br>4) Accessories: <br><br>- 1x Power adapter (220V? 110V)  <br><br>-1x Grinder <br><br>-12x Wheels <br><br>-25x Drill bits