Product descriptionColor: 4 PackColor: NavySpecification:Size: 55 x 50 mm1. Function - Lawn mower blade sharpener can be used for sharp mower blades to make the blade sharp again. Use in sharpening lawn blade, lawn tractors, mower, tillers, drill blade, sickle cutter, etc.2. Advantages - Fast, automatic, easy, safe, saves time and effort.3. Material - The thickness of the grinding wheel is 0.78 inch, thicker than ordinary grinding wheels. Made of corundum, high quality, durable, long service life, the blade sharpener can be used repeatedly. (high quality, can be used many times)4. Size - 55 x 50 mm for each. They are small enough to fit in tight spaces and sturdy enough to sharpen your blades. Fits most electric drills and hand drills.5. Simple Operation - Drill and hand drill can use it to set each tool edge to 25 degree cutting edge. Then you can sharpen the blade quickly and easily.6. Package Includes - Totally 4 mower blade sharpeners in the package, which are beautiful lawn mower blades sharpened with an electric drill.