claw ring
A ring that resembles an animal claw. Although it's called a ring, it's usually longer than a normal ring and covers the finger up to the first or second knuckle. It may also include a bendable joint.
Also known as a finger claw ring or a finger armor ring.
In China zhijiatao (指甲套) were worn during the Ming and Qing dynasties by nobility, to protect their long nails, which were in fashion for men and women. Images depicting hanfu and machu wear from these eras often include what is called a "claw ring" on this site.