A BONE FIXATION SYSTEM INCLUDES A BONE FIXATION DEVICE (101) INCLUDING A FIRST ELEMENT (102) HAVING A FIRST CHANNEL (110) EXTENDING THERETHROUGH AND A SECOND ELEMENT (104) INCLUDING A PROXIMAL PORTION (140) SIZED AND SHAPED TO BE RECEIVED WITHIN THE FIRST CHANNEL SUCH THAT THE LONGITUDINAL AXES (LL, L2)OF THE FIRST AND SECOND ELEMENTS ARE SUBSTANTIALLY COAXIAL AND A DISTAL PORTION (142) INCLUDING A BONE ENGAGING STRUCTURE (144) A PROXIMAL END (112) OF THE SECOND ELEMENT SLIDABLY LOCKED WITHIN THE FIRST CHANNEL SUCH THAT THE FIRST AND SECOND ELEMENTS ARE LONGITUDINALLY MOVABLE RELATIVE TO ONE ANOTHER BETWEEN A PERMITTED RANGE OF MOTION. THE SYSTEM ALSO INCLUDES A DRIVING TOOL (160) INCLUDING AN OUTER SLEEVE (162) AND AN INNER SLEEVE (166) SLIDABLY RECEIVED THERE THROUGH A DISTAL END (164) OF THE OUTER SLEEVE CONFIGURED TO ENGAGE THE PROXIMAL END (106) OF THE FIRST ELEMENT TO PREVENT RELATIVE ROTATION THEREBETWEEN A DISTAL END (168) OF THE INNER SLEEVE CONFIGURED TO ENGAGE THE PROXIMAL END OF THE SECOND ELEMENT.
