High-quality Materials: Built-in alloy steel sword, wear-resistant and durable with lower chance of broken cores. The ABS resin body has high impact resistance and high wear resistance and drop resistance. Auto-in Function: Automatic pen insertion function, you can cut by inserting the pen directly, Can apply various pencils, and the internal spring automatically corrects the position of the pencils. Auto Elimination of Broken Cores: Pencil sharpener with automatic elimination of broken cores. The pencil sharpener can timely exclude the broken cores to prevent the jamming phenomenon caused by the broken core Adjustable Point: The pencil sharpener allows you to adjust the thickness of the pen tip. You can rotate the adjustment knob on the rear handle to sharpen pencils of different thicknesses. It can be applied to pencils of different shapes such as triangles, hexagons and circles. Large-capacity Shavings Box: This pencil sharpener has a larger shavings bin which do not need frequent cleaning.