I have had trouble before trying to buy the Tool Logic card which contains a blade with serrated edge because it was held up by customs in Australia, which makes it obvious that it is unsuitable for both check-in or carry-on luggage when traveling.
However, it appears that there are types of swiss army cards that may have tools which are deemed to be safe to carry on planes when travelling internationally. Just wondering if anyone has done so before or have had experiences to share about these types of gadgets?
As per the comment, I am thinking mainly between Australia and USA as the destinations. If there is a lot of different between the laws for different countries I will put up another questions for those specific countries.