1. High-speed metal grinding heads have points of immoderate hardness, excessive wear resistance, excessive warm temperature resistance and influence resistance. 2. It could be easily screwed onto an electrical grinder and can easily sharpen chains and serrated blades. 3. The guides in the kit sprucing attitude 4. This product is electrical grinding accessories kit, and it is going to be used with electric grinder. and beautiful Weight: about 41g Size: 70 x 50mm Sharpening attachment length: about 70mm Ruler length: about 70 color:Silver Material:High pace steel Package Contents: 2 x Gear grinding tools 3 x grinding rod Only the above kit content, other merchandise aren't included. Note: Light and different reveals can cause the color of the thing in the picture barely diversified from the genuine thing. The size allowed error is +/- 1-3cm.