Specification:

1. The power is stable and output, and the secant is more than enough to slash; 

2. One-piece pen structure, changing the needle, adjusting the length of the needle, simple and convenient; 

3.DC interface - alloy protective layer, tightly connected, more resistant to wear; 

4. New hand-slip anti-slip design, comfortable pen grip, good hand feeling, not tired for long time use; 

5 All cartridges can be used