98SN95

im finally ready to put my crank back in but cant figure out how to tourqe the jack screws to the proper tourqe, there completly round so its not like you can put any wrench on them, so how the hell do i tourqe these things, if anybody knows please let me know, i had to use a brass punch to loosen them, but cant put it back together like that cause it needs to be tourqed, so how do i tourqe a screw thats completly round????