1. material The knife set is made of high speed steel, which is more robust and durable. It has an exquisite and neat shape design. The small wooden file is sharp enough and can be used for a long time. Tool handle diameter: 3 mm, blade diameter: 6 mm. The 3MM carbide end mill is compatible with most grinders, electric screwdrivers, drills and engraving tools. Please check the size before buying.^ 2. Double-sided cutting head Suitable for deburring and polishing iron, steel, carbon steel, alloy steel, stainless steel, copper, aluminum and other metals, as well as marble, jade and bone.^ 3. Scope of Customization Suitable for most tools - usually hand-held electric or pneumatic tool operators (also for machine tools). The speed of electric or pneumatic tools is typically 6,000 to 50,000 revolutions per minute.^ 4. Several grinding heads 20 different burrs, e.g. B. conical s, V s, cylindrical s. Various cutting machines can fully meet your DIY needs. The burrs of small files are easier to control during processing. Suitable for fine and precise processing.^ 5. Widely used Widely used in metal processing, tool making, model making, wood carving, jewelry making, welding, chamfering, casting, deburring, grinding, etc. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.