Yasuji Steel No. 1 Blue Paper can be used and sharpened to the handle - Wood carving - Shape: Round; Blade width: 0.5 inches (12 mm); Total length: 1.8 inches (45 mm); Compatible models: HCT-30S, HCT-30Z, HMA-100A, HMA-100B, HMA-100BE, HCT-30C; Blade thickness: 0C; YUK; Blade thickness: 0C. Use No. 1 (FR 2221, HSSC uses high speed steel)