Stock up your workspace with your most commonly used leads so that when the moment strikes you have everything you need to keep creating! These leads are same fine quality, 2mm drafting leads as found in the Mars Lumograph pencils. Details:Available in multiple pencil grades0.078" (2 mm) drafting leads5.125" (13 cm) long leads in standard12 leadsStored in a container Smearproof and smudge proof Fits most lead holdersIdeal for Mars Lumograph pencils (sold separately)Carbon lead