One for all pencil: suitable for any pencil with diameter 6.5-8 mm: round, triangular, hexagon? regular pencil, color pencil, graphic pencil. Long Duration: High qualified steel cutter made the sharpener stable and durable. Ready to Use at anywhere: No need to set it up with any screws. Open the box, find a desk, and sharpen a pencil within 8 seconds! Plastic body made this sharpener light enough to carry it in bag with you. Large Capacity: large transparent shaving box. Big enough for 40 pecils' sharpening. Automatic Feding and Stopping System: no need to push the pencil during the shaving process! Just pull out the front board and clip it onto the pencil, and the pencil will be autuomaticlly pushed into the machine. And it will stop once the pencil was finely sharpened, and help saving your pencil!