Kum 104.03.01 Magnesium Alloy Metal 1-Hole Steel Blade Rectangular Pencil Sharpeners This 1-hole DTA tempered steel blade pencil sharpener is made of magnesium alloy metal 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 Features two spare blades on side. Block profile with recessed grip area It comes in rectangular shape