Descriptions 10pcs 3x12 6x22 6x25mm abrasive mounted grinding stone spherical head wheel abrasive tools for rotary toolSpecifications Material White CorundumMaximum speed 12000 rpmGrinding Head ShapeGrinding Head Dia Total LengthGrinding Head LengthShank Dia Spherical12mm43mm12mm3mm22mm41mm22mm6mm25mm50mm25mm6mmQuantity 10pcs same size Features White corundum grinding head has the characteristics of high hardness excellent self sharpness strong grinding force high efficiency acid and alkali corrosion resistance and high temperature resistance White corundum grinding head is easy to break sharp edges and corners good cutting performance and small grinding heat G eneral grinding for thin walled parts high speed steel alloy steel hardened steel workpieces gear grinding threading and profile grinding as well as some steel with higher hardness such as bearing steels and automotive steel sleeves Package Included 10 Pcs xSpherical Head Shank Mounted StonesMore Details