BNBS Natural sharpener whetstone stone terrazzo knife sharpening Black Gem oilstone wholesale customization size Free Shipping

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    Type: Sharpeners;Certification: CIQ;Brand Name: BNBS;Model Number: Black Gem stone oilstone;Feature: Eco-Friendly;Metal Type: Black Gem stone;Size: 150*50*12mm;

    Black marble stone is a high-grade Whetstone, hardness is only inferior to diamond Whetstone, its hardness is comparable with ruby stone, but its grinding rate is higher than ruby, that is faster than Ruby grinding, sharpening sharp. At the same time, it also has polishing effect.

    Black marble stone, very delicate structure, close, belong to wear-resisting Whetstone, grinding rate is high, hard alloy precision original can be thrown grinding.

    Apply to the processing of high toughness quenched steel, alloy steel, precision measuring tools and instrument parts, such as higher brightness requirements of the workpiece.





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