These superior quality charcoal pencils come in 3 grades of hardness: Soft, Medium and Hard. They move smoothly on the paper, can be blurred and are easy to sharpen. The wooden pencil casing aids in drawing without a mess, making them easier to use than conventional charcoals. Lyra Rembrandt Charcoal Pencils have a beautiful, soft, powdery core which is perfect for outlining or sketching. Being blendable and water-soluble means a huge number of effects can be achieved. Use of fixative is recommended.