Fällkniven FS4 Flipstone Sharpener [FNFS4]
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Delivery time is additional. Business days exclude weekends and holidays. Shipping details.Fällkniven FS4 Flipstone Sharpener
The FS4 is the larger Flipstone, combining diamond and synthetic-sapphire ceramic sharpening surfaces in a folding handle. Its button-operated opening mechanism locks the stone in the working position, while a separate catch secures it for storage.
Use the diamond face for edge restoration and the ceramic face for refinement. The stone is intended for dry use, with soap and water reserved for cleaning the surfaces when metal residue builds up.
Specifications
| Manufacturer reference | FS4 |
|---|---|
| Folded length | 112.8 mm |
| Unfolded length | 190 mm |
| Sharpening surfaces | Diamond and ceramic |
| Store SKU | FNFS4 |