2mm HB clutch pencil refills - pack of 12

Pencils are graded based on the ratio of clay and graphite each pencil contains. More graphite gives a softer, darker line while more clay makes for a harder, lighter line. A HB pencil is equal parts clay and graphite making for a great all around option.

Pencil grades from hardest to softest:

4H, 2H, H, F, HB, B, 2B, 4B, 6B, 8B