Fixer + Angle Ring: Specially used for angle devices with different angles, saving time and effort. Metal Stainless Steel Forging: High temperature forging of stainless steel , with high hardness. Can be used for jewelry tools and workbenches, with a wide range of applications. High Precision: Precise angle, easy for craftsmen to sharpen knives. Accurate angle, easy to use.If you have any questions, please feel free to contact us; we will reply to you within 24 hours.