Sharpen Spyderco knives and other blades with the Spyderco Ceramic Four File Set. This unique set contains four different ceramic sharpeners that are small enough to fit into the pocket and use out in the field, or on the go. The four files in this set include the round, square, triangular, and slip stone. All are long and narrow. All are approximately five inches long with an average quarter inch diameter. 

The four file set makes it possible to sharpen and polish as wide range of blade types and other sharpening tools. The slip stones are perfect for curved blades and serrated blades. Square stones for flat blades. Round and triangular stones are useful for many blade shapes. The slip stones also have a groove line for sharpening and polishing small hooks and points. 

Spyderco ceramic files are kiln hardened to three thousand degrees Fahrenheit, and bonded with Alumina particles on the surface. These particles are made from fine synthetic Sapphires. The files are hard enough to sharpen and polish the hardest steel and even carbide tipped blades. After using the ceramic files, wash them with a scouring pad and powdered abrasive cleaner. Spyderco ceramic files are manufactured in the United States.