Feature: 1. High-speed steel grinding heads are characterized by high hardness, high wear resistance, high heat resistance and impact resistance, so you don't have to worry about it being damaged. 2. Can be easily screwed onto the electric grinder and the chain and serrated blades can be easily smoothed. 3. High quality process manufacturing, long life, easy to apply and use. 4. Equipped with a wrench and 3 pcs of grinding rod to facilitate your works. 5. These attachment will make your work more convenient and labor-saving. Specification: Item Type:Sharpening Attachment Material:Steel Weight: 50 g / 1.76 oz(approx.) Grinding Rod Shank Length:45mm / 1.77in Thread:M19 Wrench Length:71mm / 2.8in Package List: 1 x Grinding Plate 1 x Wrench 3 x Grinding Rod Note: Please allow 1-3mm differs due to manual measurement.