the bottom of said head being flat and substantially perpendicular to the axis of said cylinder body, said measuring element being axially slidable in a bore closely adjacent to the flat bottom of said head and substantially parallel thereto, to facilitate measurement of {HEAD ~ even very shallow holes} in {TAIL ~ workpieces} 
the bottom of said head being flat and substantially perpendicular to the axis of said cylinder body , said measuring element being axially slidable in a bore closely adjacent to the flat bottom of said head and substantially parallel thereto , to facilitate measurement of { HEAD ~ even very shallow holes } in { TAIL ~ workpieces }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH 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 HEAD REL TAIL TAIL TAIL TAIL TAIL