The spring is mounted inside the recessed hole in the box end of the wrench and connected between {HEAD ~ the projecting rod} of {TAIL ~ the toothed arch block} and inside wall of the recessed hole 
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The spring is mounted inside the recessed hole in the box end of the wrench and connected between { HEAD ~ the projecting rod } of { TAIL ~ the toothed arch block } and inside wall of the recessed hole
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 TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH