Faber-Castell's PITT pencils were designed for sketching as they harder than conventional pastel pencils. This means the lines you create do not disappear completely when smudged, they are also water and fade resistant. The pencils are ideal for contours, outlines and fine details and are rich in pigment. The harder core also means that they may be a bit more durable when sharpening them to a fine point.
Pitt Graphite Matt features a matt and deep black lead, specially developed to reduce light reflections on the paper to create maximum depth effect by varying degrees of hardness.