Ardennes-Coticule Belgian Blue Whetstone 100percent Handmade Medium. These Kung Fu Supplies by Ardennes-Coticule are crafted from the finest materials such as novaculite and novaculite carbonitride which are incredibly durable and excellent for sharpening. The secret to the superior sharpening performance of Ardennes-Coticule Belgian Blue Whetstones is the clever combination of triangular shaped sharpening stones that actually work by using a series of tiny ceramic rods embedded in the triangular sections of the stone. This allows the triangular shapes to make precise sharpening possible by putting the triangular sharpening site directly in contact with the edge of the blade. This adds to the uniqueness of this amazing sharpening tool. Topped with a discerning finish these stones will bring your blade back to life. Add a bit of class to your knife using the Ardennes-Coticule Belgian Blue Whetstone. Package Contents: Ardennes-Coticule Belgian Blue Whetstone Ardennes-Coticule 606: Belgian Blue Whetstone 100percent Handmade In Belgium Medium