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Sanding and sharpening device for the sharpening of ceramic or steel blades Rasenmähermesser. istorsharpener.ch instructions: Knives sector, household and garden shears, axe, scythe Sicheln, And professional istor sharpener made of metal Doppelschärfer istor Diamantschleifstein with hardened steel with diamond coating; Product description Sheffield Istor Duplex Swiss Sharpener; Product description Sheffield Istor Duplex Swiss Sharpener; Sheffield Istor Duplex Swiss Sharpener