Originally Posted by David-A

How long ago, and was it really 4 inches?

The only reason I ask, is becuase I'd seen them at a few spanish airports, pull out peoples nail sisors etc quite reliably - but they are also sensible - on many occasions they will examine said item and if it complies with the rules (they will measure, etc) they will let people continue (a machette or sword will obviously not be permitted.]

This has inspired confidence, compared with other airports that reject miniscule nail clippers, but allow through sharp: belt buckles pins, shoe heels, nibbed pens, etc. All of which can be highly practical weapons.