The Staedtler Noris tub sharpener is a quality pencil sharpener in an eye-catching design. Designed for standard-sized black lead pencils up to 8.2 mm with a sharpening angle of 23 degrees for clear and accurate lines. The sharpener insert is a high quality metal sharpener and provides quality results every time. The insert is housed in a handy plastic tub with hinged cover which prevents shavings from spilling. The lid of the tub has a safety lock to avoid accidental opening.