Built-in alloy steel sword, wear-resistant and durable. ABS resin sword body has high impact resistance, high wear resistance and fall resistance.Automatic pen insertion function, convenient and quick, directly insert the pen to cut, all kinds of pins with diameters of 6.9-8mm are applicable, and the internal spring automatically corrects the insertion position of the pen.Five-stage pen tip thickness adjustable design, the pen tip thickness can be adjusted at will, and the adjustment knob on the rear handle can be rotated to sharpen pens of different thicknesses.It can be used for pencils of different shapes such as triangles, hexagons and circles.The transparent storage box can be checked at any time and cleaned in time. The bottom cushion design increases the friction with the desktop and is placed more stably.