Only our sculpting props are made from Yasuki Steel (Yasuki Hagane) which is said to be the best of steel. Yasuki Steel is a steel that has been treated to the extreme extent of impurities that can affect its sharpness, and is classified as yellow paper, white paper, and blue paper depending on its hardness and stickiness. Blue Paper: The hardest and most wear-resistant steel on plain paper with tungsten or chrome added to the blue paper. Abrasion resistant for long lasting sharpness.
Keep out of reach of children. After use, please apply anti-rust oil and store it