The Shapton Kuromaku #320 is a coarse stone designed for repair and major edge work. Use it when a knife has chips, a rounded edge, or needs a new bevel angle.

The #320 grit removes steel quickly and significantly reduces the time required to reshape a damaged edge. It is typically the first step when the edge is chipped, heavily worn or needs reprofiling.

Once the edge shape has been restored, sharpening continues with finer stones to refine and finish the edge.

The Kuromaku series is a splash-and-go Japanese ceramic sharpening stone, which means no soaking is required. Simply add water and begin sharpening. The hard ceramic composition wears slowly and helps the stone maintain a flat surface longer than many traditional water stones.

It works effectively on both carbon steels and modern stainless steels.

The #320 is the first step in a common sharpening progression: #320 → #1000 → #2000.

Used together, these stones allow you to repair, sharpen and refine an edge from start to finish. We offer all three stones as a complete set for those who want a practical sharpening and maintenance system.