Kum 103.06.31 Magnesium Alloy 1-Hole Steel Blade Barrel Pencil Sharpeners with Waste Container, Colors Vary This 1-hole steel blade pencil sharpeners is made of milled magnesium alloy The blades are made of high-carbon steel, therefore long-lasting and very sharp This inner sharpener features screw-on top Dynamic torsion action built into each blade makes for a smoother, cleaner cut It comes in barrel shape containers and three assorted colors