AUTO-FEED FEATUREDUTY HELICAL STEEL BLADESpecifically designed Auto-feed feature, simply, efficiently, securely and reliably.Pencil Sharpener With a heavy duty helical steel blade, can sharpen up to 6000 times. The rotary blade has alloy structure, which is more durable. LARGE-CAPACITY STORAGE BOXThe large-capacity storage box can be used for a long time without staining other places. ABS plastic parts are strong, durable, colorfast and recyclable. Self-feed Pencil SharpenerThis artist pencil sharpener is super easy to operate, just insert the pencil into the holder and crank clockwise while holding the sharpener, the pencil starts to move inside the sharpener with each crank; when the resistance decreases crank it anticlockwise and the pencil starts to come out on its own! Do not sharpen any more when the pencil is done, or it will chew up your pencils! Quiet and convenientManual operation is easy for school children to use.Ideal for schools, home, and officeQuiet and reliable,with minimal disruption. It is suitable for various places: school, home, library, studio, outdoor. Can work easily for students, always, painters, designers, and children.