The ring is not only a beautiful artifact, But also a multifunctional ring. It has a very sharp blade, so you can open the blade to protect yourself in an emergency, including cutting a thick rope.2. It can be used in life as a tiny knife. When you don't have a special tool, you can use it to cut food packaging, express boxes, cans, plastic bottles, etc.3. The ring is made of stainless steel, machined with high precision technology. It's beautiful and durabl; It is washable and easy to clean and maintaine.4.Its size is adjustable, you can adjust the size to 16-22mm to fit different fingers. And it can remember the size, you don't need to adjust repeatedly.5.Great self defense Ring for women, girls, ladies, family, friends, business, birthday, him and her.Comes with ring box.