You can quietly carry the Heart Attack on your keychain and be ready to protect yourself anytime. The Heart Attack is small (3 1/2" x 2") piece of extremely hard and durable, "space-age" plastic, and it's "just an innocent keychain" if anyone asks. When needed, for self-defense, you simply hold it between your fingers and punch! Attackers beware! This will certainly hurt them, and ruin their day.
The beauty of the Heart Attack Keychain, is that it is not considered a weapon, and it does not set-off a metal detector, and it can quietly and conveniently go with you, almost anywhere.