Fallkniven FS4 Flipstone Sharpener Portable Double-Sided Ceramic And Diamond Sharpening Stone For Outdoor Knife Care

The Fallkniven FS4 Flipstone Sharpener is a compact folding sharpener designed for knife owners who want precise, field-ready edge maintenance without the mess. It combines a ceramic 1 µm honing surface with a diamond 25 µm surface in a pocket-friendly, oil-free design.

• Two-Sided Sharpening Surface: 3" tapered stone with ceramic 1 µm grit on one side and diamond 25 µm grit on the other for fine honing and faster material removal.
• Folding Design with Zytel Handle: The stone folds into a 4 3/8" black Zytel handle for compact storage and easy transport.
• Oil- and Water-Free Sharpening: Dry sharpening that keeps your setup clean and ready—no lubrication needed.
• Secure Deployment: Depress button lock flips the stone from handle to sharpening surface safely.
• Pocket-Knife Form Factor: Open or closed, the sharpener resembles a compact pocket knife for discreet carry and quick access.
• Origin and Packaging: Crafted in Sweden and sold with retail-ready hang packaging for easy display.

This FS4 model is ideal for knife enthusiasts who want a dependable, portable sharpening solution without the complexity of liquids or multiple tools. The dual-surface design lets you hone to a fine edge with the 1 µm ceramic side and tackle quicker material removal with the 25 µm diamond side. Its folding, pocket-knife-like form ensures safe storage and easy travel—perfect for in-field touch-ups, camping kits, or keeping kitchen blades razor-sharp between uses. The Sweden-made craftsmanship underpins durable construction, while the single, mess-free sharpening experience saves time and effort in everyday maintenance.