From what I have read and what I have tried the drills were mounted on shafts just like arrowheads. Two methods that seem to work the best : For drilling quick holes in leather, wood or bone just putting the shaft between two palms and moving the palms forward and back works quite well. For bigger jobs like drilling slate, stone or shell a block of wood was used with a partial hole to put downward pressure on the shaft. A small bow is used to spin the shaft just like you have seen to start fires. It works quite well.