Fällkniven DC4 Whetstone
The DC4 sharpener is a newly developed combination whetstone, where one side (the bright one) is a fine diamond whetstone (25 micron), and the other (the dark one) is a fine ceramic whetstone. A leather case is included. The yellow surface consists of titanium aluminum nitride (TAN) which considerably prolongs the functional life of the whetstone. We recommend a combination of diamond and ceramic, where the diamond whetstone restores the wedge form of the blade edge and the ceramic whetstone smoothes the edge to obtain long-term sharpness. Most of the time the sharpness provided by the diamond whetstone is more than enough.