A tool set for drilling a hole with no need for a pilot hole 
 
- Wide range compatible such as 1.2mm and 2.2mm. 
- If there are fluctuations in the size of parts, you can dig a 0.1mm larger hole to make the work easier.
- Unlike regular pin vise drills, the drill blade can drill a flat hole. 
- Possible to dig flat round molds without a pilot hole. 
*There will be a small hole in the center due to the center guide. 
Set content:
- GH-CSB-12-17: 1.2mm/1.3mm/1.6mm/1.7mm 
- GH-CSB-12-17: 2.1mm/2.2mm/2.6mm/2.7mm 
- GH-CSB-31-33: 3.1mm/3.2mm/3.3mm 
- GH-CSB-35-37: 3.5mm/3.6mm/3.7mm