A inscription in wood. Ancient Buddhist sutras written in a circular pattern. Etched in wood with a hot iron. According to the man displaying it, there are only a few craftsmen in Korea capable of making these.
Sonny and Tina fight with long, pole weapons similar to a voulge, glaive. All had single edged, curved or crescent shaped blades, some with barbed curves at the ends. Perhaps remeniscent of a Chinese Guandao? It's too bad I'm not familiar enough with these weapons to speak more authoritatively. Nevertheless, we had fun playing around with them. (Don't try this at home!)