Drilling and tapping screw with ragged cutting edges

Claim 1

A DRILLING AND TAPPING SCREW COMPRISING AN ELONGATED SHANK HAVING A FORGED ENTERING END PORTION AND AN ENLARGED TOOL RECEIVING HEAD PORION INTEGRAL WITH A TRAILING END PORTION OF THE SHANK, SAID FORGED ENTERING END PORTION HAVING A THICKNESS AT ITS EXTREMITY SUBSTANTIALLY LESS THAN THE DIAMETER OF THE REMAINDER OF SAID SHANK, SAID END PORTION INCLUDING A TRANSVERSELY DISPOSED END SURFACE AND A PLURALITY OF FLUTE MEANS EXTENDING AXIALLY AWAY FROM SAID END SURFACE AND INTERSECTING THE PERIPHERY OF SAID FORGED ENTERING END PORTION, SAID FLUTE MEANS DEFINING RAKE AND RELIEF MEANS ON OPPOSITE SIDES OF SAID FORGED ENTERING END PORTION ADJACENT SAID END SURFACE, SAID END SURFACE HAVING AXIALLY INCLINED RANDOM AND IRREGUALR RAGGED CUTTING EDGES BEING OF THE SAME MATERIAL AS THE FORGED ENTERING END PORTION AND THE REMAINDER OF THE SCREW, SAID CUTTING EDGES PROJECTING DOWNWARDLY BETWEEN SAID RAKE AND RELIEF MEANS ON OPPOSITE SIDES OF A DIAMETRAL PLANE INCLUDING THE AXIS OF SAID SHANK TO DEFINE A V-SHAPED DRILLING TIP PORTION, SAID SHANK INCLUDING A PLURALITY OF HELICAL THREAD CONVOLUTIONS EXTENDING TOWARD THE TRAILING END PORTION OF THE SHANK TO DEFINE A TAPPING PORTION.