SafeGuard Protective Self-Defense Keychain - Personal Safety Investment That's Worth a Lifetime Remarkable self-defense tool against beast or other kinds of predators Perfect sized, low profile, always with-you, self-defense ready protection CNC Precision Machined, Attacker Repellant, Industrial Steel Construction Mil-tec design provides superior grip under dangerous/stressful situations Includes easy-to-learn, self-defense keychain course