I don't know if I can find the screener or the supervisor at fault here. If I was to come across an item that could appear to be a weapon, but am not absolutely sure, I would summon a LEO to clear it up. I will say that cuffing her was a bit excessive.

For example, one of my screeners came across a slapjack. On x-ray, it appeared as a really heavy spoon. When discovered, it was handed to me. I've never come across one before so I was a bit on the dumbfounded side. The passenger told me it was a shoehorn. I've never seen a lead weighted leather shoehorn before. I summoned a LEO, only because they have more experience and knowledge of common and uncommon weapons. The LEO identified the weapon, but the passenger was not arrested. His information was taken and he was informed that the TSA regulatory department would be calling him soon. And on his way, he went!

Like I said, the only thing I find excessive was the cuffing portion. But that's only my opinion. Take it for what it's worth!