I think carrying that will get you some time in jail if stopped & searched by LEOs. That single knuck may pass as a keychain, but your design is nothing but a non-metallic concealed dagger & knuckle-duster combo.
You also shouldn't be pitching or selling anything without the proper membership here on BF.
Originally Posted by Bastid
-Convincing knuckleheads that the real key tool lies between the ears in creativity, application of common sense, adaptation and thinking out of the box might just be a losing battle.