Fallkniven FS4 Flipstone Sharpener – Black Zytel

FS4 Flipstone Sharpener

3" 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 4 3/8" 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. Hang packaged.

Product SKU: FNFS4

Product Brand: Fallkniven

Product Price: 37.36

Price Valid Until:

Premium pocket-sized flip stone sharpener with larger surface area and dual ceramic-diamond abrasives for reliable edge maintenance.

• Closed Length: 4 3/8 inches
• Stone Size: 3 inches tapered double-sided
• Ceramic Side: 1 micron grit for polishing
• Diamond Side: 25 micron grit for edge restoration
• Handle: Black Zytel with button lock deployment
• Operation: Oil and water-free sharpening

The FS4 balances portability with practical stone surface area. Its flat design enables smooth sharpening strokes. Suited for serious outdoor users, camping trips, and field work where reliable edge touch-ups matter.