Yoshihiro High Carbon Blue Steel 1 Suminagashi Kiritsuke Multipurpose Japanese Chef Knife Yoshikuni Series 10.5in(270mm)with Ebony Handle Grade: Suminagashi (Damascus) Blade: Single Edge / Includes Free Tsubaki Knife Oil and Sabitori Free Rust eraser Knife Care Kit Material: Ao-ko High-Carbon Steel (Blue steel#1) Handle: Ebony Handle / Bolster Material: Water Buffalo Horn (Bolster Color Varies) Edge Angle: Single-Edged/ HRC: 64 /Saya Cover: Included