Pencil Colored Pen Set Drawing Sketch Tool Hardness B H HB School Artist Supply. Hard pencils – typically used for technical drawing, sketching and contours Soft pencils – used when shading The hangers – make it possible to smear a line in the drawing with charcoal Sandpaper – helpful for sharpening graphite. The pencils are marked with numbers or letters indicating the degree of hardness. B – soft pencils H – hard pencils. The set is placed in a hard, rigid pencil case / case – simple and safe to transport. Specification Set includes 100 pieces Pencil case dimensions: 29 x 22 x 5 cm. Type: pencil set brand: Ragi hardness: hardness B, hardness H, hardness HB.