<ul><li>3-Mode Operation: Rotation Only & Hammering with Rotation and Hammering Only</li> <br /> <li> Extended service life of carbon brushes</li> <br /> <li> Recessed Lock-on button for continuous use</li> <br /> <li> No Hammering When Idling" function ensures extra-low vibration under no load</li> <br /> <li> 0-1