Sharpen planes easily and accurately from beans (width 1.6 inches (40 mm) to large planes (width 3.1 inches (80 mm)). Comes with gauge. ■ Grintec K2 Features: Finely adjust the planes angle and maintain a constant angle for polishing. ■ GRINTECH friendly functions; Easy measurement of planar blades; Grintec K2 included gauge, allows you to easily measure the width of the plane, total length, and blade angle. Easy installation of planes blade. Press the head and sides of the planes to each stopper, and secure them in place while reading the scales. Adjustable to any angle of the blade, each knob can be adjusted to the position of the plane and roller to achieve the desired angle. Fine adjustment of blade edge polishing: Turn the fine adjustment knob and keep the reference line according to the scale, making fine adjustments easy. Precise grinding without training and pushing the lower edge onto the grindstone, so the blade angle is fixed and easy to grind.