The Atoma Tsuboman Diamond Sharpening Plate #400 is a professional tool for leveling water stones and precise sharpening of knives, chisels, and razors. The #400 grit provides an ideal balance between effective material removal and giving the blade a smooth finish. By using monocrystalline diamonds, the plate is highly durable and does not deform during use.
The abrasive surface with a #400 grit is perfect for the process of leveling water stones, which is crucial for maintaining their sharpening effectiveness. It is also suitable for precise blade grinding, removing minor damage, and improving cutting edges. The high quality of the diamond powder allows for work with even the hardest powder steels, such as ZDP-189, HAP-40, or R2.
Thanks to the electrolytic diamond bonding process, the abrasive is exceptionally durable and evenly distributed on the plate’s surface. The construction, based on a solid aluminum base, ensures stability and comfortable use. The replaceable abrasive layer allows for long-term use without the need to purchase a new plate.
The Atoma Tsuboman Diamond Sharpening Plate #400 is an excellent choice for professionals and enthusiasts who demand precision and effectiveness in the sharpening process. It is indispensable for leveling water stones, grinding, and blade maintenance.
Technical data:
- Sharpener type: diamond stone
- Grit: #400
- Overall dimensions: 210 x 75 x 12 mm
- Abrasive: diamond powder
- Base: aluminum plate
- Replaceable abrasive part
- Weight: 548 grams
- Purpose: knives, razors, chisels, scissors
- Origin: Japan
Advantages of Atoma diamond sharpening stones:
Quickly removes material during repair or changing blade geometry
Fast grinding and leveling
Can be used for sharpening very hard powder steels (ZDP-189, HAP-40, R2)
Maintains its shape and does not wear or warp during use
Lower grits (#140 and #400) are perfect for leveling water stones




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