A power tool handle (100) is selectively connectable to a power tool head (104,106,108,110). The power tool handle includes a grip portion (112) defining longitudinal axis (A), and a motor (102) housed within the handle and including a drive shaft (150) driven by the motor, the drive shaft mounted for rotation within the handle and defining an axis of rotation substantially parallel to the longitudinal axis (A) of the handle. The power tool handle also includes a trigger (113) disposed proximate the grip portion for actuating the motor, and a button (137) movable in a direction defining an axis substantially parallel to the longitudinal axis to a first position when the tool head is coupled to the handle and to a second position when the tool head is removed from the handle. In the first position, the trigger (113) can actuate the motor, and in the second position, the trigger is inhibited from actuating the motor.