This DIY zipper pull/ID tag ("dog tag") necklace knife is the latest version of Mack the Knife, my razor blade knife. It's also good for a keychain, survival kit, wallet, purse, etc.. It's kept perpetually RAZOR sharp, LITERALLY, by inserting new blades that cost ten cents each. I show a glow-in-the-dark glowfob version [so it is easy to find your keys at night] as well as other skins [Link to a Howto video below.]
Razor knives are dangerous, so keep them out of reach of children and if you put one on your key chain or ball chain necklace don't forget about it, like when you pass through a security checkpoint, since the TSA, etc. probably won't take kindly to them. Necklaces should always have break-away designs so if an enemy yanks them or if they get snagged when you accidentally trip and fall they won't harm you.
I made a rudimentary HOWTO video on making the original versions, Mack 1 and Mack 2. It is age restricted and not for children:
[ Ссылка ]
