To create expressive sketches or detailed technical and architectural drawings, keep this fine art pencil on hand. Made from smooth, dark graphite, each Onyx pencil sharpens to a non-crumbly point and delivers dense, rich, jet-black tones (darker than a 9B). Explore the possibilities and build up darker shades by applying increased pressure, or create lighter, more detailed artwork with a controlled hand. Details: Available in medium and dark tones4 mm graphite core