In a preferred embodiment, the ring gear is a rearwardly facing beveled gear for {HEAD ~ use} with {TAIL ~ a beveled drive gear} and the head portion defines a forwardly directed thrust surface engageable by a bearing surface of the drive tool to urge the drive gear against the ring gear 
with
In a preferred embodiment , the ring gear is a rearwardly facing beveled gear for { HEAD ~ use } with { TAIL ~ a beveled drive gear } and the head portion defines a forwardly directed thrust surface engageable by a bearing surface of the drive tool to urge the drive gear against the ring gear
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL 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