More information· Ergonomic triangular profile, sharpened on both sides · Marking on glossy or dark surfaces · Black half: high-quality coarse universal lead - 2B graphite · White half: high-quality coarse universal lead - white · For marking on all glossy surfaces , such as metal, glass, plastic, tiles, ceramics, laminate, etc. · Powerful marking lines, even on wet surfaces · Markings are easy to clean with a damp cloth