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