This is not out till May but I like the idea not sure how practical it will be until I have tried it will let you know.
Brass Key Shaped Pocket Knife Necklace - The Locksmiths Knife
Mermaid Pocket Knife Necklace - Limited Edition from Contrary
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Carcasa multiusos al estilo navaja suiza. Vista en: https://plus.google.com/104713749399801427273/posts/UdTo8tTgxLc
The Belt Knife is a must. Having multiple hidden knifes is just a safe way of making sure you stay alive. If you've been ambushed and you're knifes are gone, havng a back up plan is a must.
rhubarbes: “ArtStation - Sci-Fi Sword, by Travis Davids ”
GIRLY KNIVES | Fear Nothing: Pretty Weapons for Bad Ass Girls | xoJane