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