1. High-speed steel grinding heads have features of high hardness, high wear resistance, high heat resistance and impact resistance. 2. It can be easily screwed onto an electric grinder and can easily sharpen chains and serrated blades. 3. The guides in the accessories provide the best sharpening angle 4. This product is electric grinding accessories kit, and it should be used with electric grinder. 100% brand new and high quality Weight: about 41g Size: 70 x 50mm Sharpening attachment length: about 70mm Ruler length: about 70.09mm color:Silver Material:High speed steel Package Contents: 2 x Gear grinding tools 3 x grinding rod Only the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm. _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_