This retractable mechanical pencil comes with a lead core that rotates each time you write, ensuring the core always stays pointed and ready to use. This pencil comes with a double speed engine that sharpens faster, as well as a mechanism that works to prevent excess lead core breakage. Measure 0.3mm and comes in variuos colors. Mechanical Pencil 0.3mm/Knock Retractable/Engine/Pipe Slide 1.46x1.07x14.3cm