A device, method and system adapted to determine a targeting position on a surgically implantable nail adapted to be used in internal fixation of a bone, the nail comprising a distal end and a proximal end, the device including an extension rod comprising a longitudinal axis and adapted to be detachably coupled to the proximal end of the nail, a bridge member adjustably secured to the extension rod and extending radially from the longitudinal axis of the extension rod, a position of the bridge member on the extension rod being rotationally and longitudinally adjustable with respect to the longitudinal axis of the extension rod, and a targeting arm adjustably coupled to the bridge member and extending from the bridge member toward the distal end of the locking nail, the targeting arm comprising a drill guide.