Description: Suitable for the edge grinding of hand tools such as knives and cutting tools. Made of corundum, it is not easy to break,durable and long time use. The polishing wheel sharpens easily and quickly,saves time and effort. Strong grinding force and good concentricity. Restore the sharpness of the original blade and help eliminate the knife marks on rocks and sticks. Material: Corundum Size: 57x64x7mm/2.24x2.51x0.27inch Package Includes: 1 Piece Lawnmower Blade Sharpener Note: The color may have different as the difference display, please understand. Please allow 1-3mm error due to hand test