Two opposite sides of the holding portion extend perpendicularly to form a pair of {HEAD ~ opposite stabilizing wings} locating at a same side as the buckling slice with {TAIL ~ respect} to the holding portion 
Two opposite sides of the holding portion extend perpendicularly to form a pair of { HEAD ~ opposite stabilizing wings } locating at a same side as the buckling slice with { TAIL ~ respect } to the holding portion
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH