The chisel sharpener is made of cast aluminum. Fully coated with paint, long lasting. By turning the screw cap to adjust the clamping width, the honing guide is compatible with scissors from 3mm to 47mm in width and flat irons from 34mm to 79mm in width. Sharpening angles can be fine tuned using the sharpening jig by adjusting the projection of the tool. Chisel projection 30 mm for 30 degrees, 40 mm for 25 degrees. Flat projection of 38 mm for 30 degrees, 50 mm for 25 degrees. The design replaces ordinary steel wheels with bearing wheels, for smoother use. The honing guide can accurately sharpen the edge of your tools due to the careful processing of the working face. The sharpening guide is compatible with wood chisel, planer, blade, chisel, carving knife, iron, flat chisel, edge sharpening. It works on oil stones and water stones. How to use 1. Twist the screw cap, clamp the chisel or other knife in place, and move the angle up and down. Note the measurement. 2. Then tighten the screw cap, the edge of the blade is firmly attached to the whetstone. Finally, slide the blade back and forth over the whetstone until the blade is sharper. 1. Fine-tune the angle By adjusting the projection of the tool, sharpening angles can be fine-tuned using the sharpening device. Chisel protrusion 30 mm for 30 degrees, 40 mm for 25 degrees. Flat iron protrusion 38 mm for 30 degrees, 50 mm for 25 degrees. 2. Various uses The sharpening guide is compatible with wood chisels, planes, blades, engravers, carving knives, flat irons, flat chisels and edge sharpening. It works on oil stones and water stones. 3. Construction Angle sharpener is made of cast aluminum. Fully coated with paint, long lasting.