Winrich Fine Art Graphite Pencils (9H - 12B) are the ultimate tools for all sketching, drawing, and hatching applications. Winrich is the direct manufactory for grahpites, we have the best native grahpite mine by our own, so we well known for their superior quality, these traditional pencils are made by mixing and then grinding together different types of graphite with high-grade fireproof ceramic clay. This special clay gives the graphite high breaking strength. The proportion of graphite to clay determines the softness and darkness of the lead. Hardness/softness grades from 12B (softest) to 9H cover the full range of applications. Softer grades produce broader and darker strokes. Harder grades produce more precise and lighter strokes. Winrich Fine Art Graphite Pencils are used in a hard cedar (or chinese cedar, chinese red linden) wood , which guarantees utmost strength and very easy sharpening. The wide range of degrees makes Art Design an ideal tool for artists and graphic designers. Especially break resistant super-bonded lead. Lines reproduce well. Assorted sets available.