Thank you for viewing. [Product Overview] "Banzhi" refers to a ring for the thumb. Its history is very old. Originally, it was used as a finger protector to protect the finger from the string when drawing a bow. However, during the Qing dynasty, it became very popular as an ornament for noble men. The material was originally often made of gold, silver, or other animal bones, but during the Qing dynasty, many were produced, especially those made of jade and jadeite. [Product Description] Material: Unknown Size: Height: 23.5mm Diameter: 30.5mm Inner Diameter: 22.6mm Weight: 39.2g "It has a double structure, and the outer ring (outer circumference) can rotate." As it is an old item, there are scratches, scuffs, stains, discoloration, and wear. This is one of the items that came out while organizing items inherited from my collector grandfather. Details such as appraisal evaluation, the age of the collection, and the material are unknown. Please check the condition carefully in the images and make your own judgment. Popular word: Antique tools