Heavy-duty sharpener features a helical, 12-blade cutter for super-fast sharpening. Auto-stop technology prohibits you from oversharpening your writing utensils to prevent wasteful use. Extra-large shavings reservoir holds more at once to minimize trips to the wastebasket. Quiet operation prevents you from distracting others in quiet settings. Safety shutoff halts the motor when the shavings reservoir is removed for safe use. Adjustable dial accommodates up to six different pencil sizes. Sharpener is perfect for all school, home and office uses.