MIYABI Birchwood 9" Sharpening Steel G2 micro-carbide powder steel Authentic thin Japanese blade profile Hand-honed using the three-step Honbazuke process to a 9.5 to 12 degree edge CRYODUR blade, ice-hardened to Rockwell 63 101-layer flower Damascus design with katana edge Traditional Japanese Karelian (Masur) Birch handle Rounded spine and heel Handcrafted in Seki, Japan