Atoma Economy #400 Diamond Plate (Refill) – by Tsuboman, Japan

The Atoma Economy #400 Diamond Plate by Tsuboman is an affordable and reliable option for diamond sharpening. Unlike traditional whetstones or ceramic stones, diamond plates do not wear down or become concave over time. They also don’t require water during sharpening, making them simple and efficient to use.

This refill version is designed as a replacement plate for the standard Atoma diamond stone with an aluminum base. It features a 400 grit surface — ideal for fast material removal, repairing small chips, and reestablishing a knife’s edge.

Atoma plates use a patented dispersion technique that prevents clogging, ensuring consistent performance throughout their lifespan. In addition to knife sharpening, the Atoma #400 can also be used to flatten whetstones, maintaining perfectly even surfaces on your sharpening setup.

Specifications

• Material: Diamond lapped on aluminum

• Grit: #400 (Coarse)

• Dimensions: 8¼" × 3" × ⅜" (21 × 7.5 × 1.1 cm)

• Type: Refill plate (no base included)

• Made in Japan

⚠️ Please note: There are counterfeit products on the market. Ensure authenticity by purchasing from authorized dealers.