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