They do not require glue as they are connected to each other with magnets. They are securely supported on your own eyelashes until you decide to remove them. They are lightweight and do not strain the eyes, and they can be reused. For easier application, it is recommended to have your own lashes tinted and use the special placement tweezers The brush is suitable for combing and separating the eyelashes. It is a set of products useful for eyelash placement.