Perfect for high-volume use in the office or classroom. Features helical, 10-blade, carbon steel cutting head for longer lasting cutting performance. With auto-stop technology, sharpener shuts off when your pencil has the perfect point. Multi-hole dial accommodates a variety of pencil sizes. Super quiet operation. Safety shut-off if the shavings receptacle is removed. Black with silver accents, plus a clear shavings bin so you can see when it needs to be emptied. 10-year limited manufacturer's warranty.