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