
| Grade | Color | Application |
| VKD003-01 | Black | Steel below HRC50°, nickel-based alloy. |
| VKD003-02 | Colorful | Stainless steel. |
| VKD003-03 | Bronze | Steel, stainless steel. |
| VKD003-04 | Purple | Stainless steel, steel. |
| VKD003-05 | Bronze | Alloys, special materials. |
| VKD003-06 | Gold | Stainless steel, steel, superalloys. |