We sell a lot of them to folks who travel by air without a change of clothes and also to parents of youths for whom they are buying a complete outfit but don't want junior to have a knife.
They look just the same as the real thing when being worn in the sock.
It would add authenticity to the kilt – and a lot less hassle when flying.
Called the safety sgain as I recall. Don’t have one in my collection as like functional stuff. :-)