Best Electric Pencil Sharpener for Home, Office, School UL listed, high quality ensured Bigger and stronger helical blade Sharpen pencils super fast in 3-5 seconds Designed for 6-8mm No. 2 pencils and colored pencils Durable for heavy use, enable to sharpen 200 pencils without overheating Auto start and finish sharpening when the resistance of sharpener decreases