The Eco friendly "green" pencil that uses less trees! Less waste- Wopex uses over 90% of the tree wood, compared to traditional pencils which use only 30% of the tree! Non-slip, velvet soft surface. The homogeneous lead glides smoothly across the paper. Smooth and even sharpening thoruhg consistent WOPEX material. Excellent lead stability and break-resistance. Write out length up to twice as long as comparable wood-cased pencils.