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Londonderry Forge produces 2 diamond point mandrels for their tool maintenance kit. The diamond point, like the other mandrels, can be inserted into the ends of the Spiral Tapers.
The Conical Diamond Point Mandrel- Medium is slightly more aggressive than Londonderry's regular mandrels. The Conical Diamond Point can be used to sharpen any knife.
The Tapered Diamond Point Mandrel- Fine is a narrow mandrel, ideal for sharpening loop knives and other knives with hard to access blades.