Privacy levers have a locking mechanism for privacy and are typically used on a bedroom or bathroom door. Privacy locks don't provide the amount of security that an exterior keyed lock would so they are not recommended for exterior doors. Some privacy locks have a turn button lock mechanism in the lever, while others have a push-button or push pin in the rosette. They are also shipped with a generic unlocking tool that can be used to unlock the door in the event of an emergency. There is a pinhole in the lever handle or rosette on the exterior where the generic unlocking tool is inserted to unlock.