A sharp knife is only as good as the last time it was sharpened — and the Marttiini Diamond Sharpening Steel makes that easier than most. The diamond-coated rod removes just enough material to restore a true edge quickly and cleanly, and works on even the hardest stainless chrome steel blades that a standard honing steel can't touch. For kitchen knives and filleting knives especially, regular use keeps the edge where it belongs — making each sharpening session faster and lighter work than recovering a blade that's been left to go dull.

The handle is black rubber with a secure grip and a hanging loop at the end for convenient storage. At 10 inches, the rod has enough length for full-stroke sharpening on longer blades without awkward repositioning.

• Brand: Marttiini
• Country: Designed in Finland, Made in Estonia
• Length of Sharpener: 10" (25.5 cm)
• Total Length: 16.9" (43 cm)
• Blade Material: Steel Alloy / Diamond Granulation
• Handle Material: Black Rubber
  

How to use:

Hold the steel vertically with the tip resting on a stable surface. Slide the knife downward along the rod with the blade angled upward, maintaining consistent contact from heel to tip. To find the correct angle, measure the gap between the handle guard and the rod: approximately 1 cm for standard Marttiini kitchen knives, and 0.5 cm for smaller kitchen knives and filleting knives — this gives the recommended 22-degree sharpening angle. Run each side of the blade along the steel 3 to 5 times, alternating sides. If you're unsure whether you're hitting the right angle, mark the bevel lightly with a marker pen — you'll see immediately where the diamond is making contact. Wash and dry the steel after use.