Very cheap /the equivalent of 6$ / bulgarian made synthetic combination sharpening stone made of carborundum / green silicon carbide.

Manufacturer web site - [ Ссылка ]

Common for bulgarian hardware stores.

Works pretty good for initial sharpening or repairing damaged edges of common gardening, forestry or wood working tools and the typical reasonably priced kitchen knives - soft (50 to 55 HRc ) stainless steel with low carbon content (0.5 to 0.7%)

Thanks for watching and have a nice day.

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