Outdoor Non-lethal Self-defense Tools Defense Self Defense Men Woman Personal Safety Supplies Ninja Kicks Non-Lethal Self Defense Product for your shoe. This Product Listing is for one pair. INSTALLATION: Insert product underneath the laces of your shoe on on top of its tongue. DIRECTIONS: Kick attacker, zombies, or whatever anywhere. An easy to use but effective self defense tool that requires no previous martial arts training. Use quick on an assailant and make your escape safely. Size: 6.4 x 2.5 x 2.5