Sets of 5.6mm leads for use with the Art Alternatives Clutch Pencil or other 5.6mm lead holders. The Graphite Set contains four graphite leads - two of grade 2B and one each of grades 4B and 6B. The Sketching Set contains five leads in traditional sketching colors: black, bistre, sepia, sanguine and white. Both sets conform to ASTM D-4236.