?AFMAT Heavy Duty Pencil Sharpener? The electric pencil sharpener heavy duty is a must for teachers or anyone who has a heavy use on pencil sharpeners. Powerful enough to sharpen your No. 2 pencils or colored pencils to a perfect and durable point in only 3-5 seconds with ease. Professional automatic pencil sharpener with heavy duty helical blade can sharpen over 6000 times. Please don't push the pencil too hard when sharpening. ?Electric Pencil Sharpener Heavy Duty for Classroom?This classroom pencil sharpener is faster, more durable and powerful than any other helical blade sharpeners due to its bigger and stronger helical blade.