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