Complaint
These diamond drill bits made of high-speed steel that is durable and have a long sevice life,which are high quality and good performance that excellent for making clean and accurate hole.
| Item | Diamond Core Drill Bit |
| Material | HHS + Diamond |
| Finish | Galvanized |
| Diameter | 6-50mm |
| Color | Silver |
| Packing | Opp Bag |
1. Put glass drill into the driller.
2. Because this hole saw cannot locate the center, so please cutting with it slowly with 45 degrees.
3. Please cut a small mark first to locate the center, then you can cut the material vertically.
4. The speed needs to be controlled, not too fast and water is required during cutting.
