The charcoal bar is designed for drawing and sketching on paper. The charcoal bar markings are easy to erase. There is no doubt about its using. For the price, we can say we are the most challengeable in the market for the same kind. It is mainly used for oil painting,Chinese painting,sketch,fine arts ect It use a hard paper box packaged,25 pcs set,store conveniently It is the essential tool for sketch and drawing