Item Type: Pencil Sharpener Product Material: ABS + Iron Product Size: Approx. 12.8 x 10.4 x 6.9cm / 5 x 4.1 x 2.7in (Crank inlucded) (There might be a minor error in the manual Measurement.) Sharpening Diameter: Approx. 8mm / 0.3in Applicable Pencila Model: Circle, triangle, hex and other polygons.  1、High quality helical balde core promoises simple, fine and efficient pencil sharpening, no burrs and not easy to break the core.  2、This pencil sharpener can use 5000 times, and the 8mm hole diameter can effectively sharpen round, triangle, hex and other polygon pencils.  3、Adjustable design allows you to sharpen the pencil tip from thick to thin, which will meet all yor writing needs.  4、The small pencil sharpener is very easy to operate, and suits for various places, including office, classroom, home, etc.  5、Unique design, practical and intelligent, showing elegance in calmness, and exquisite workmanship with highlighting quality.