A Miyabi Birchwood 5000MCD 9" honing steel (SKU 32541-230). Official page: tungsten carbide rod for frequent honing to realign the edge. Karelian (Masur) Birch handle. Made in Japan. Hand-wash. This is the steel that ships with the Birchwood line, not a kitchen knife. Specs from the zwilling.com Birchwood 9" sharpening steel page.