The **Spyderco set of ceramic sharpening rods fine, 400F** is a set of 4 pieces of fine ceramic sharpening rods in a leather case.
### The set is comprised of the following sharpening rods:
* [Spyderco ceramic sharpening rod round fine, 400F1R]
* [Spyderco ceramic sharpening rod triangle fine, 400F1T]
* [Spyderco ceramic sharpening rod square fine, 400F1S]
* [Spyderco ceramic sharpening rod slip stone fine, 400F1SP]
Each file is made from aluminium oxide (industrial sapphire) with a fine grain.
Its hardness is 9.2 on the Mohs scale, almost as hard as diamond. As such you can even sharpen rock-solid metals and even most carbides.
### Maintenance
If the ceramic files become visibly dirty with metal deposits, a scouring pad and a little liquid abrasive are enough to make them look like new again. The sharpening stones can safely be cleaned in the dishwasher or autoclave, but you can, also easily clean them with a little liquid abrasive or a [Lansky eraser block.]
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