The Mace Keyguard self defense spray unit includes a key ring that can be easily attached to your home, office or car keys. * Mace Key Guard is apprx. 3 inches long so the compact design makes it convienient to carry. * The Key Guard features a hinged safety cap that flips open to reveal the actuator button, and an orientation tab that allows you to feel when the unit is properly aimed. * The Keyguard is refillable. * Convenient size to conceal if needed.