Staedtler mars lumograph is available in up to 16 degrees - for writing, drawing and sketching on paper and matt drafting film. The super-bonded lead wears evenly and is easy to erase and sharpen. Not only is it an ideal creative companion for drawing and sketching purposes - but also an art-form in its own right. There are unbelievably break-resistant through special lead formulation and super-bonded lead.