A self-defense keychain is a discreet and handy tool that can provide women with an added sense of security. These keychains often feature a sharp point or a small weapon-like attachment that can be used to defend oneself in case of an attack. They are designed to be easily accessible and can be carried along with keys or attached to a bag. Self-defense keychains come in various designs and materials, allowing women to choose one that suits their style and comfort.