Koh-I-Noor Artists' Blocks come in three different types - a sepia range, firm charcoal in 3 degrees, and a graphite set. The sepia set contains 2 each russet brown, light brown, and dark brown. The charoal set contains 2 each #1 soft, #2 medium, and #3 hard. The graphite set contains 2 each 2B, 4B, and 6B.
They are ideal for use on newsprint, bristol, colored paper or heavily textured surfaces.