【HIGH-QUALITY Heavy Duty Helical Blade】Our electric pencil sharpener's blade crafted from high-quality materials. Helical Blade can make the pencil sharpener up to about 3000 times of sharpening without wearing out. It also would faster than other pencil sharpener only need 8s to completely. Fit for sharpening #2 pencils, colored pencils, charcoal pencils, etc