[Round Seal Engraving Blade Leather Winding Blade Double-edged 0.08 inch (2 mm) / Product Size Blade Width 0.08 inch (2 mm) / Total Length 6.7 inch (170 mm) / Blade Width 0.08 inch (2 mm) for engraving stamp materials. Suitable for carving stamp material from 0.5cm square to 1.5cm This is a blade, so please handle with care. Keep out of reach of children. The sword used when carving the stamp material is called a seal engraving sword. The seal engraving knife is also called iron brushes, because it hits the brush where it is in writing. The stamp blade (seal engraving blade) has a single blade or double edge, and the shaft shape is cylindrical and square column. Made in Kanematsu Kogyo, Seki City, Gifu Prefecture, a town of cutlery.