About 400 million nano-diamond particles are blended in each leads, which make them smoother, stronger and darker

Remarkable Points

  • Contains approximatey 400 million nano-diamond particles in each leads
  • Smooth and break-resistance


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.