The formula is secret – the pencil is world-famous!\n\n- It was with pencils that STAEDTLER’s success story began.\n\n- To this very day, first-class materials and manufacturing processes guarantee outstanding and unbeatable product quality.\n\n\n- STAEDTLER Mars Lumograph is available in up to 16 degrees – for writing, drawing and sketching on paper and matt drafting film.\n\n- The super-bonded lead wears evenly and is easy to erase and sharpen.