Suehiro's radiused stones are manufactured for use on the edges of sickles, hoes and other gardening tools. For this reason, the range focuses on robust coarse and medium grits.

They are available as a coarse (#180), medium (#500) and fine (#1000) stone.

They feature three straight sides and one radiused side. This allows them to be used both on straight- or convex- bladed tools such as hedge shears, shovels and hatchets as well as the concave edges of sickles and hoes.

For best results, allow to sit in a bucket of water for 3-5 minutes before commencing sharpening, and add water while sharpening if the stone dries out.

This stone measures 134×40×30mm.