Product Description Built-in alloy steel blade, wear-resistant and durable. ABS resin blade offers high impact resistance, wear resistance, and drop resistance. Automatic nib insertion function for quick and easy sharpening; simply insert the nib to sharpen. Suitable for various nib sizes from 6.9-8mm. Built-in spring automatically corrects the nib insertion position. Five-level adjustable nib thickness design; the adjustment knob on the rear handle can be rotated to sharpen different nib thicknesses. Can be used to sharpen pencils of various shapes, including triangular, hexagonal, and round. Transparent storage box for easy viewing and timely cleaning. Bottom cushioning design increases friction with the desktop for greater stability.