A. Durability: It is made of tungsten carbide steel. Its hardness can reach below HRC85. It has a relatively long service life, and is sharp and durable. B. Uses: It is widely used in fields like metal processing, tool manufacturing, model making, welding, chamfering, casting, grinding, milling, cylinder flaring, and engraving. It is easy to hold and use, and is relatively safe and reliable. C. Wide scope of application, including auto repair shops, general stores, the aviation industry, brake repair shops, industrial workshops, mold manufacturers, metal processing, tool manufacturing, model making, etc. D. Shape: Cylindrical grinding head E. Grain size: 1000 mesh F. Application type: Polishing G. Polishing use: Engraving H. Color: Silver I. Material: Tungsten carbide steel J. Dimensions: The head diameter is 12 mm, the handle diameter is 6 mm, and the length is 55 - 67 mm. K. Package contents: - 1 Type A cylindrical file - 1 Type D spherical file - 1 Type E elliptical file - 1 Type F arc round - head file - 1 Type G bent - tip file Only the above package contents are included, and other items are not included. L. Precautions: Light and different displays may cause the color of the item to vary slightly from the actual product. The allowable measurement error is +/- 1 - 3 cm.