Craftsman Professional 7.5 Amp Corded 1/2-Inch Rear Handle Drill, Model 9-27161 7.5 amp motor provides the torque power and durability for continuous drilling Auxiliary handle for added comfort and control Variable speed 0 to 850 revolutions per minute allows matching speeds to a variety of materials in a wide range of high torque job applications Spindle Lock locks spindle for fast and easy bit changes Trigger switch controls variable speeds and provides comfortable one hand control