The Shun Premier Steel 9" (TDM0790) is the perfect match for your Shun Premier knives. Its guard is ingeniously built with the proper angle already set up: just lay your knife flat against the lightly magnetic guard to ensure the proper angle when using the steel. Finally, this steel is hardened at an optimal level to hone Shun’s high hardness blades. Keep your Shun Knives and Tools sharp and well maintained with this honing steel along with a Combination Whetstone , Leveling Stone , and Knife Care Kit .