head e g wedge barrel provided a peripheral surface of a revolution fixed to said shank and constructed for operational releasable engagement by a spin and axial thrust providing tool 2 providing a tool constructed and dimensioned for releasably engaging said enlarged head in a manner whereby to axially spin said head and thus said mine bolt through a predetermined permissible torque range and automatically to interrupt such axial spin function once said predetermined torque range is exceeded and 3 operatively releasably engaging said tool with said enlarged head in brief summation standing alone the concept of a wedge barrel having an interior conical taper of nominally 7 degrees with corresponding wedges therein for gripping a cable bolt length passing through the wedge barrel or collar is well known in the art and is widely practiced in the industry the problem heretofore has been forming the proximal end of the barrel or collar or the wedge elements themselves with a positive drive head in the form of a hex head square head or other non circular head this results in an undesirable continuous positive drive wherein the torque imposed to spin the cable bolt is unrelieved even though the optional point of resin mix and torque resistance is passed resulting in a lessening of the holding power of the.