We have Makita HR4040C 1-9/16-Inch Spline Rotary Hammer Drill with Product Detail Reduced vibration for less operator fatigue Spline type drive system for maximum power Electronic variable speed control dial (230 - 450 RPM) for easier hole starts One-touch sliding chuck for easy bit installation and removal Soft start electronic switch for smooth starts and constant speed control . The "Makita HR4040C 1-9/16-Inch Spline Rotary Hammer Drill" is best product for you. We recommended Makita HR4040C 1-9/16-Inch Spline Rotary Hammer Drill