An enlarged portion 84 at the rearward end of the shank 82 defines a forwardly facing surface portion 86 for engagement by {TAIL ~ a yoke} 88 of {HEAD ~ a drive tool} 90 
An enlarged portion 84 at the rearward end of the shank 82 defines a forwardly facing surface portion 86 for engagement by { TAIL ~ a yoke } 88 of { HEAD ~ a drive tool } 90
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH