1. IN A MACHINE FOR ATTACHING A SCOOPED WEDGE HEEL TO A SHOE AND HAVING A NAILING DIE FOR SUPPORTING THE SHOE BY ENGAGEMENT WITH THE REAR PORTION OF AN INSOLE OF THE SHOE, A PLUNGER MOVABLE TOWARD AND AWAY FROM THE NAILING DIE, POWER MEANS FOR MOVING SAID PLUNGER TOWARD AND AWAY FROM THE NAILING DIE, AN ADAPTOR INITIALLY SECURED IN A PREDETERMINED POSITION TO THE PLUNGER, A CARRIER JOURNALED UPON THE ADAPTOR FOR MOVEMENT ABOUT AN AXIS EXTENDING WIDTHWISE OF THE NAILING DIE, AND MEANS FOR INITIALLY MOVING THE CARRIER UPON THE ADAPTOR INTO DIFFERENT OPERATING POSITIONS ABOUT SAID AXIS, A HOLDDOWN MOUNTED ON THE CARRIER AND INITIALLY MOVABLE LENGTHWISE OF THE DIE INTO DIFFERENT OPERATIVE POSITIONS WITH RELATION OF THE DIE AND THE ADAPTOR, SAID HOLDDOWN COMPRISING A TREAD ABUTMENT HAVING A FLAT FACE ADAPTED TO ENGAGE THE TREAD OF THE SCOOPED WEDGE HEEL TO BE ATTACHED TO THE SHOE, A SHANK ABUTMENT ATTACHED TO SAID TREAD ABUTMENT, AND MEANS FOR SELECTIVELY VARYING THE HEEL-CONTACTING ARE OF THE HOLDDOWN COMPRISING MEANS FOR ADJUSTING THE SHANK ABUTMENT LENGTHWISE OF SAID FLAT FACE OF THE TREAD ABUTMENT.