so you can sharpen any length or shape blade up to 3 ½" wide

The Edge Pro Apex knife sharpener kit is a patented wet stone sharpening system that will sharpen any size or shape blade (up to 3 ½" wide)

A Jasper micro-quartz structure consists of fused crystal grains of different sizes

The working surface is curved

4" Magnetic attachment for long knives (11 cm wide)

chosera narrow stone edge pro Grit:10000 so you can sharpen anyChosera sharpening stones are used for sharpening knives on Hapstone and Edge Pro knife sharpeners. Chosera is a high end series from Naniwa made of aluminum oxide with the magnesia binder. The magnesia binder gives Chosera excellent sharpening quality and performance, and high wear resistance. Narrow stones (12 mm wide) are suitable for recurved blades. All Chosera stones are 6 mm thick and are mounted on high quality aluminum blanks. Chosera series