Kum 105.39.21 Magnesium 2-Hole Double Sharpener, Colors Vary 2-Hole double sharpener is made of magnesium alloy This double sharpener comes with 8mm and 10mm holes for some special-diameter triangular and hexagonal pencils 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 with plastic container, pencil hole cover