{HEAD ~ The toothed arch block} is mounted in {TAIL ~ a recessed hole} inside the box end of the wrench, having a projecting rod raised from a back side thereof 
is mounted in
{ HEAD ~ The toothed arch block } is mounted in { TAIL ~ a recessed hole } inside the box end of the wrench , having a projecting rod raised from a back side thereof
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH