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Item: FS4
The Fallkniven FS4 Flipstone is a compact folding sharpener featuring both diamond and ceramic sharpening surfaces. The 25-micron diamond side is coated with Titanium Aluminum Nitride for sharpening and restoring an edge, while the 9-micron synthetic sapphire ceramic side provides a finer finish. Designed to be used dry, the stones maintain a smooth, flat surface and can handle even hard specialty powder steels. A locking spring mechanism folds the sharpening surface securely into the Zytel handle for convenient storage and transport.