One-piece alloy steel saber for better wear resistance and longer life. The body is very resistant to impact and wear. The automatic pen insertion function is convenient and easy to cut by inserting the pen directly, most pencils can be used and the spring internal automatically corrects the position of the nib. The thickness of the nib is adjustable in five steps, and the design allows the thickness of the nib to be adjusted. You can sharpen pens of different thicknesses by turning the adjusting knob on the rear handle. It can be used for different pen shapes such as triangular, hexagonal and round. The transparent bin is visible at all times and can be cleaned quickly. The soft pad at the base increases friction with the table and stabilizes the location.