Printing system and method for printing substrates

A screwdriver comprising:

• a handle including a longitudinal axis, one of a bit holder or a screwdriver blade at a first end of the handle and extending in a direction of the longitudinal axis;
• a drive mechanism in the handle, the drive mechanism causing a bit holder in the handle or the screwdriver blade opposite the handle to rotate, which drive mechanism includes a motor and a freewheel through which the motor is coupled to the bit holder or the screwdriver blade, the freewheel designed to relieve torque when manual torque is introduced into the bit holder or the screwdriver blade through the handle,
• wherein the drive mechanism includes a torque limiter for limiting drive torque of the motor on the bit holder or the screwdriver blade,
• wherein the drive mechanism includes a switching device for switching the motor on and off, the switching device includes a switching ring rotatable by a manually introduced torque, the switching ring connected to the motor such that the motor is actuated upon rotation of the switching ring, wherein the motor is selectively rotatable about the longitudinal axis in a clockwise direction and a counterclockwise direction in response to rotational movement of the switching ring in a first direction and in a second direction, respectively.