Combining comfort style and innovative tech Tombow Mono Graph Mechanical Pencils feature a unique shaker mechanism that lets you advance the lead with a quick flick of the wrist Drafting Supplies Illustration and Drawing Supplies Mechanical Pencils Mechanical Pencils and Accessories Pencils Tombow Mono Graph Mechanical Pencils Ice Blue 0 5 mm Shop the Tombow Mono Graph Mechanical Pencil - Ice Blue at ProBlack in our School Supplies collection.