SInoart Compressed Charcoal Stick Card of 6

Compressed charcoal is a combination of finely ground, powdered charcoal and binding agent. The amount of powdered charcoal and binding agent used determines the softness of the charcoal stick.ƒ€š Compressed charcoal is harder than vine and willow sticks.ƒ€š 
Because of its hardness, compressed charcoal can be sharpened, producing finer detailed lines that you canƒ¢€š¬€ž¢t achieve with willow and vine. Compressed charcoal also produces darker lines and possesses break-resistant qualities the others don't.

Card of 6 pieces, 2 each of soft, medium and hard grades.