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