QEP 21650 5/8-Inch Heavy Duty Mixing Drill for Thin-Set, Grout and Specialty Mortar Mixing Powerful 6 Amp mixing drill motor includes a 0-600 rpm convenient variable speed switch, 110 Volts (with North American plug) The 100-Percent die cast aluminum housing protects the internal components from everyday wear and tear The high torque, double reduction gears provide increased torque for mixing even the thickest mortars Side handles provide comfort and maximum mixing leverage, while the d-handle rotates a full 360-Degree