Handheld power tool

A handheld power tool comprising:

• a main body, containing therein a driving unit, and having a working end, the driving unit including a driving shaft that extends toward the working end, and the driving shaft being flexible and bendable;
• a connecting seat, being attached to the working end of the main body, and having a radially inward extending ball socket and a plurality of through holes at least arranged at two opposite sides thereof, wherein the through holes extend radially and communicate with the ball socket;
• a connector, having a ball seat received in the ball socket and having two opposite sides thereof pivotally connected to the connecting seat so as to be swingable, the ball seat having an outer periphery thereof formed with a plurality of inclines axially extending and arranged in tandem, wherein the inclines are alternately aligned with the through holes as the ball seat swings;
• a clamp, being mounted around an outer periphery of the connecting seat, and being C-shaped with a gap formed between two ends thereof, wherein each of the two ends is provided with a raised portion;
• an adjusting member, having a stem that passes through the two raised portions and having a driving portion connected to one end of the stem for drawing the two raised portions close to finally abut against each other or separating the two raised portions far away, so as to size the gap and in turn make the clamp constricted or released, and the clamp further having a spring leaf that covers the through holes;
• a plurality of retaining balls, being each received in a respective said through hole and retained by the clamp so as to fall on the incline aligned with the through holes, wherein when the clamp is constricted, the spring leaf of the clamp presses the retaining balls radially against the incline, so as to hold the ball seat within the ball socket;
• an end cap, being attached to one end of the connecting seat where the connector juts out;
• and
• a workpiece, being rotatably connected to the connector, wherein the driving shaft passes through the connecting seat and the connector before transmissibly connected to the workpiece.