Zotoyi Personal Alarm for Women Self-Defense Security Alarm Keychain 139DB Self-Defense Electronic Device Security Alarm Keychain with LED Light for Girls Women Kids and Elders Leaves thin protective film behind for reduced friction and improved rust and corrosion protection Functions as a cleaner, lubricant and preservative Removes carbon, gunpowder, dirt, grime and more Cleans lubes and protects Stops rust and corrosion Seals out moisture Penetrates into tight fitting areas Removes carbon and powder