The driving shaft 310 extends from the handle to the driving interface or connector 315 that is keyed (e.g., as a hexagonal or other keyed structure) to a driving receptacle 186 in the head portion 185 of the locking screw 180, which is configured to receive the driving connector 315 in order to allow rotation of the locking screw 180 via rotation of the handle 305 of the lock screw tool 300.