The insert & fins are held in {TAIL ~ place} by use of {HEAD ~ grub screws} which screw through the receptacle at an angle and apply pressure to the insert and fin together 
The insert & fins are held in { TAIL ~ place } by use of { HEAD ~ grub screws } which screw through the receptacle at an angle and apply pressure to the insert and fin together
OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH