NIUNIU The knife sharpener has a high quality grinding wheel that is strong and strong enough to make your mower with a clean and sharp edge. Easily get sharp edges on the lawn mower blade without cavities or dents; keep the blade balanced. fits every bit; the integrated guide creates the correct edge angle, the permanent grinding wheel. Intended Use: Works on most mowers without removing the blade - get your blade looking like new in under 10 minutes. quantity of delivery:1 piece (Package contents: Only the above package contents, excluding other products.) size:56*50*6.35mm (Reminder: The size is measured manually, please allow 1-2 cm measurement error) color:blue colors (Due to different monitors and lighting effects, the actual color of the item may be slightly different from the color shown on the picture.)