About 400 million nano-diamond particles are blended in each leads, which make them smoother, stronger and darker
Remarkable Points
- Smooth and break-resistance
- Contains approximatey 400 million nano-diamond particles in each leads
Strong and Smooth Writing
Each Nano Dia pencil lead contains diamond component and enhance firm internal graphite structure. This also improve smoothness and darkness.
Functional Design
Design to use conveniently whereby the lid can open twosteps.
Made of “needle-crystal” carbon, which improve smoothness, strength and darkness.
Remarkable Points
- Smooth and break-resistance
