Small steelyard, scientific name, is a precision weighing instrument specially used to weigh gold, silver, precious drugs and spices in the old society. Stefanie is designed according to 1 kg, which is equal to 16. Because of its exquisite materials, fine workmanship and unique skills, it is also regarded as a very high-grade collection.

Swallow scales were especially popular in Qing dynasty, which were mainly used to weigh some valuable gold, silver, jewelry, Chinese herbal medicines and smoked soil, with grams as the unit of measurement and thallium as brass or copper. There are bones, ivory, horns, ebony and so on. The best is ivory, which is also of high value.