Fallkniven Flip Stone Sharpener FN. Designed utilizing strong and dependable components these Knife Sharpeners from the expert knife smiths at Fallkniven gives you years of resilience. If you're looking to make some improvements to your menu if knife items pick the Fallkniven FS3 Flip Stone Sharpener. Specifications for Fallkniven FS3 Flip Stone Sharpener: Length: 2 5/8in Features of Fallkniven FS3 Flip Stone Sharpener: 2 5/8in. tapered double sided Ceramic 1 micron grit and Diamond 25 micron grit stone. Smooth flat surface allows for easy sharpening. Uses no oil or water. Stone folds into 3 3/8in. black Zytel handle for convenient storage when not in use. Depress button lock to flip the stone out of the handle. In the open or closed position the sharpener resembles a pocket knife. Package Contents: Fallkniven FS3 Flip Stone Sharpener Fallkniven FNFS3: FS3 Flip Stone Sharpener