This is TOKO's universal edge sharpener. By changing the attachment position of the included sharpener, you can sharpen both the side and base edges. Furthermore, you can set the angle of the sharpener from 0 degrees to 5 degrees in increments of 0.5 degrees using the dial, allowing you to finish the side and base edges at your preferred angles. This is the ultimate tool for finding the best edge setting for you.