When I stumbled across Tactikey, I was intrigued by it’s ingenuity. The ‘ol “keys in your hand” trick was something taught to women (traditionally) to defend themselves against an assailant. It’s a good concept but hitting someone with your keys hurts you both. The plusses, however, are that they are always with you (accessible), hidden (concealed self-defence tool for surprise), legal (as an alternative to mace/pepper spray, stun gun or blade/firearm) and an effective force multiplier in a self-defence situation. The best self-defence tools are the ones you have with you and are accessible. Tactikey can be taken anywhere and best of all, it still allows your key to function.