Designed for high volume use in the office or school. Multi-hole dial accommodates all popular pencil sizes. Super quiet with the lowest noise rating in the industry. Super-fast sharpening using helical 10-blade technology. Sharp Sense technology allows you to feel when the pencil is at the perfect point. Auto shut off when pencil is completely sharpened. Safety cut off if the shavings reservoir is removed. Large EZ view shavings reservoir that once removed, safely deactivates the sharpener.