Mont Marte White Charcoal Pencils Lge Hex 2pce Ideal for use on dark tinted paper and can also be used in conjunction with other drawing media Use alone or to add highlights to black charcoal sketches Offer smooth colour lay down in a clean and controlled pencil form Due to fragile nature of charcoal pencils, always sharpen with a Mont Marte Hobby Knife ,we do not recommend using pencil sharpeners