These PROFESSIONAL-GRADE DIAMOND 4” FLAT-TOP ABRASIVES are especially designed for precision and long life. Great for grinding, sanding and polishing stones, all in one set. Use them also on glass and sharpening carbide tools such as gravers when combined with our GRS STONE FACETING AND GRAVER SHARPENING FIXTURE SET 
They come already MOUNTED on their respective FLAT TOP discs. 
Available in 4" Diameter in the following grades: 120, 400, 1200 and 3000 grit and 4-GRADE COMBO SET
 
With proper use, you can expect an extremely long life and durability.
