[Extend Tool Life]: When your planer or engraving knife is no longer sharp after long-term use, you can throw it away and replace it with a new one. The grinding guide can make the blade as sharp as before and extend the life of the tool. [High-quality material]: The chisel sharpening guide rail is made of high-quality carbon steel. Not easy to rust, durable. With a hardened steel dial at the bottom, it will not wear out or form flat spots over time. [Size and compatibility]: It has a flat claw for clamping the mortise and a groove claw for clamping the chisel and planer. [Choose the right angle]: By rotating the nut, you can adjust the angle of the blade, sharpen the blade as needed, and finally slide the blade back and forth on the whetstone to make the blade more precise and sharp. [Wide use]: Suitable for sharpening wood chisels, planers, blades, engraving machines, engraving knives, flat irons and flat chisels. The new perfect edge helps extend the life of many wood chisels and