High-speed steel twist drills are coated at the tip with a medium-fine diamond grit for drilling stones, ceramics, glass and other hard nonmetallic materials. Use water as a lubricant.
12 piece set contains one of each diameter: 0.90mm, 0.99mm, 1.18mm, 1.39mm, 1.51mm, 1.61mm, 1.70mm, 1.77mm, 1.99mm, 2.08mm, 2.49mm, 2.70mm
| Abrasive | Diamond |
| Bur Material | Diamond |
| Country of Origin | Taiwan |
| Diamond Grit | Medium/Fine Grit |
| Package Size | Set of 12 |
