This 1-hole inner pencil sharpener is made of plastic. The upper part of the sharpener clicks firmly into the base. 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. The blade is protected against rust by polishing, cleaning, oil coating, etc. Compact and portable, suitable for school, home or office use. It comes with high-cube container and four assorted colors.