This yumi is made from steel with rustproof coating. This ceramic tool is 3.25" x 3" (8.3cm x 7.6cm) and used for trimming uneven rims or for creating flat sides on round objects.
About Yumi
The Japanese title of this tool is “Yumi”, in English it's “Bow”. This tool maintains a taut line for cutting edges. It is used to trim off uneven rims on bowls, cups or plates, and to create flat sides on round objects. Yumi has been used in the East Asia for hundreds of years, and it is still a common pottery tool in Japan now. The most significant advantage of this tool over other cutting tools is that it is easy to control, and it can produce sharp and clean cuts on thick soft clay.