Outstanding performance: high-speed steel grinding heads are characterized by high hardness, high wear resistance, high heat resistance and high impact resistance, so you don't have to worry about damage it. High quality: high quality manufacturing process, durable, easy to apply and use. Easy installation: can be easily screwed onto the electric grinder and the chain and the serrated blades can be easily sanded. Improve your work efficiency: These accessories will make your work more convenient and save labor. Tool kit: equipped with a spanner and 3 pieces of grinding wheel to facilitate your work. Features: 1. High-speed steel grinding heads are characterized by high hardness, high wear resistance, high heat resistance and high impact resistance, so you don't have to worry about damaging it. 2. Can be easily screwed onto the electric grinder and chain and the serrated blades can be easily sanded. 3. High quality construction, durable, easy to apply and use. 4. Equipped with an adjustable wrench and 3 pieces to facilitate your work. 5. These parts will make your work more convenient and labor-saving. Features: Item Type: Joint Sharpening Material: steel. Weight: approximately 50 g. Length of the grinding rod: 45 mm. Talk: M19 Length of the key: 71 mm. Package contents: 1 x grinding plate, 1 x wrench, 3 x grinding rod Note: Measurements are taken by hand, therefore sizes shown may vary by 1-3mm.