The EBI #400 diamond stone is a professional sharpening stone manufactured by Naniwa Abrasive Manufacturing , a renowned Japanese specialist in the field of sharpening.

Equipped with a very high-hardness diamond abrasive, it allows work on all types of blades, including difficult-to-machine steels and very hard materials. Its #400 grit is a coarse grit, ideal for roughing, reshaping the edge, correcting angles, or flattening.

Its sintered diamond construction ensures excellent durability. Unlike conventional diamond plates, the 1 mm thick diamond layer is securely bonded through a sintering process, significantly reducing the risk of delamination. It provides a smooth and consistent cut even after prolonged use, while minimizing surface deformation.

The stone is used simply by wetting the surface with water. Soaking is not necessary. It comes with a buffing stone to maintain the surface and ensure optimal performance.