Slip-N-SnipFolding Scissors.

Are they allowed in airplane carry-ons (TSA approved)?

are they sharp enough to cut light fabric?

Do they fold together anymore than as shown in the picture. Maybe the two circles put together? Or do they stay laid out like the pic?

Difficult to open, close & cut, too much tension. We lightly oiled, still very difficult. Is it defective or have others had the same problems?