Professional specifications Brand new, unused Valuable, can be used on precious metals, made in Japan Custom-made for Indian jewelry Heat-treated, so On SILVER925 metal: The engraving will not blur and will be beautiful Sharp engraving is possible. Made-in-Japan engraving, custom-made chisel Special order Sterling engraving with sharp edges The image is of it being stamped into brass. Rare engraving, almost not sold in Japan For Indian jewelry production For engraving, by all means "STERLING" is a word engraved on silver products, meaning Sterling Silver = 92.5% pure silver. Also known as 925 silver (92.5% silver + 7.5% alloy such as copper). A standard silver specification widely used in accessories, tableware, and cutlery. If "STERLING", ".925", or "925" is engraved, it is highly likely to be genuine sterling silver. If a ring or accessory is engraved with "STERLING", it indicates that it is made of silver 925. STERLING engraving Engraving tools, engraving, the characters are STERLING. The sample image is of it being stamped on a round brass plate, approximately 14mm plate. The width of the characters is approximately 4mm. This is probably a chisel (engraving) that is not sold in Japan. Overseas, the inscription STERLING is often used for Indian jewelry products and the notation of silver 925 (sterling silver)! In Japan, the inscription 925 is often used, but STERLING = 925! This is a custom-made chisel, so for engravers and those interested in making silver products as a hobby, it will last a lifetime. Unlike cheap overseas engravings, the carving of each character is sharp and can be engraved very beautifully like the engraving in the image.