Norton 3X Blue Grinding Wheel K Grade Size/Grit:6 x 1 - 46 Grit Note that the numbers printed

Note that the numbers printed on the stones are Suehiro's part numbers

US-Made Combination Oil Stone: Dual-grit design offering both coarse and fine sharpening surfaces

The DMT Magna-Disc is for use on the Worksharp WS2000 and WS3000 sharpening systems

Useful in industry for sharpening many cutting implements and as an abrasive file

Norton 3X Blue Grinding Wheel K Grade Size/Grit:6 x 1 - 46 Grit Note that the numbers printedA Great Grinding Wheel For Woodturning Tools and other High Speed Steel Tool The Norton K Grade is a harder wheel that keeps its shape better than softer wheels. The harder grade is great for sharpening high speed steel tools without wearing grooves in the wheel. If you're a turner, you know what we're talking about. However, the harder wheel isn't for all situations, as we recommend the softer Norton I grade Wheel for high carbon steel tool grinding