Abstract: A device for use in a torque transmitting system including a driver having a specially configured driver end and a fastener having a specially configured recess for receiving the end of the driver, wherein the respective externally configured and internally configured components include a body having an axis in which the body has an outer polygonal cross section defined by a perimeter wall, an inner polygonal central portion positioned within the perimeter wall and having an area less than the area of the outer polygonal cross section; a drive wall which forms a portion of the perimeter wall and extends on a plane from a proximal end outwardly from the polygonal central portion to a distal end; a first outer wall forming another portion of the perimeter wall has a proximal end joining the distal end of the drive wall at an angle which may be less than 90° and a distal end terminating on the perimeter wall.

Abstract: A device for use in a torque transmitting system including a driver having a specially configured driver end and a fastener having a specially configured recess for receiving the end of the driver, wherein the respective externally configured and internally configured components include a body having an axis in which the body has an outer polygonal cross section defined by a perimeter wall, an inner polygonal central portion positioned within the perimeter wall and having an area less than the area of the outer polygonal cross section; a drive wall which forms a portion of the perimeter wall and extends on a plane from a proximal end outwardly from the polygonal central portion to a distal end; a first outer wall forming another portion of the perimeter wall has a proximal end joining the distal end of the drive wall at an angle which may be less than 900 and a distal end terminating on the perimeter wall.

Abstract: A torque transmitting or coupling arrangement for a fastener drive system or the like, wherein the respective externally configured and internally configured components include a body having an axis in which the body has a modified polygonal cross section defined by a perimeter wall. A polygonal central portion positioned within the perimeter wall has an area less than the area of the modified polygonal cross section. A drive wall which forms a portion of the perimeter wall extends on a plane from a proximal end outwardly from the polygonal central portion to a distal end. A first outer wall forming another portion of the perimeter wall has a proximal end joining the distal end of the drive wall at an angle and a distal end terminating on the perimeter wall. The system includes a fastener driver, a threaded fastener and a forming tool for forming a recess in the fastener.