All of these bits look like they have been used. Some of them are black (when they should all be pink), and all have a white substance with almost no sand/peeling left on them.
π Enhanced Superfine Assortment: Various Sizes, Multi-purpose, and Reusable
10 Review
USA Made Diamond Lapping Paste Polishing Compound 600 Grit Mesh 22-36 Microns For Rock Glass Metal Jewelry Resin Marble With High Concentration Of Diamond Powder By TechDiamondTools
30 Review
Lansky 2D2C Diamond Ceramic Four: Ultimate Sharpening Solution for Precision
13 Review
Office chair Bureaucrat CH-1300N, upholstery: textile, color: black 3C11
14 Review