1. IN COMBINATION, A PILE HAVING AT LEAST ONE HOLE OPENING THROUGH THE SIDES THEREOF AT ITS UPPER END, AND A CLAMP FOR ATTACHING SAID PILE TO THE DRIVING ELEMENT OF A PILE DRIVER, SAID CLAMP INCLUDING A RECEIVER PROVIDED WITH AT LEAST ONE BACKING PORTION, A DOUBLE-ACTING RAM WITHIN SAID RECEIVER, SAID RAM INCLUDING A RAM HEAD PORTION MOVABLE BY SAID RAM AXIALLY RELATIVE TO SAID BACKING PORTION FROM A FIRST POSITION, ONE OF SAID PORTIONS BEING ENGAGEABLE WITH SAID PILE END ON SUCH MOVEMENT, AND A CONNECTION BETWEEN SAID PILE END AND THE OTHER OF SAID PORTIONS, SAID CONNECTION INCLUDING A TRANSVERSE MEMBER IN SAID PILE HOLE IN ENGAGEMENT WITH SAID OTHER PORTION, AND CONNECTION BEING LOOSE AND DISENGAGEABLE IN SAID FIRST POSITION AND TIGHTLY INTERENGAGED ON SUCH MOVEMENT OF SAID RAM HEAD PORTION WITH SAID UPPER PILE END THEN SEATED AND CLAMPED AGAINST SAID BACKING PORTION OF SAID RECEIVER.