Zinc alloy knife holder sharper and more wear-resistant than ordinary pencil sharpeners, and 10 times more durable than ordinary pencil sharpeners 9-speed adjustable the length and thickness can be adjusted precisely, according to personal needs and personal habits, making the pencil more comfortable to use. 0.6 ultra-fine the smallest degree can reach 0.6mm, professional-grade pencil sharpener, only for sketching art. Simple black the appearance is very simple and fashionable. Our pencil sharpener quality and portability that will suit the standard sharpening needs of any student, teacher, artist, or administrator. Large-capacity storage The pen dust box has a large capacity, so you don't need to replace the debris frequently.