Kum 303.05.21 Dome Shape Ice Inner Pencil Sharpener with 45mm Hole, Colors Vary 1-Hole ice inner pencil sharpener is made of plastic The blade is protected against rust by polishing, cleaning, oil coating, etc The blades are made of high-carbon steel, therefore long-lasting and very sharp Dynamic torsion action built into each blade makes for a smoother, cleaner cut Comes in dome shape and with 45mm pencil hole