Shinkoukinzoku Pure Copper Handmade Double-Sided Grater, 160mm x 80mm, Easy to Use, Crafted by Artisans in Japan (Tsubame-Sanjo) O-6

Unlike machine-made graters, this grater's teeth are individually hand-set using traditional metal engraving techniques. This results in exceptional sharpness, allowing you to grate without separating fibers and moisture, preserving nutrients and resulting in truly delicious grated produce. The grater is made of copper. Copper's metal ions (copper ion effect) possess antibacterial and germicidal properties strong enough to kill even pathogenic E. coli O-162, making it hygienic and safe.

* Never heat in a microwave or directly over a flame. * Products made of uncoated copper without a clear lacquer coating will discolor. * Verdigris may form if used in damp environments. * Verdigris is harmless and can be used as is. If it bothers you, you can easily remove it by mixing vinegar and salt, applying it to a cloth, and polishing. * The discoloration described above is not rust, but a protective film created by the copper itself to protect itself from oxidation. The color can be restored by polishing with a copper-specific cleaner, but you can also enjoy the changes in color that occur with pure copper as you continue to use it. We hope you will appreciate these changes over time as part of the unique charm of pure copper and use it for many years to come.