Feature:1. Wide Application: Using in sharpening lawn blade, lawn tractors, mower, rototillers, drill blade, sickle bar cutter etc.2. Premium Quality: Lawn mower blade sharpener made of high quality corundum, strong and durable, quality item which will last long.3. Main Function: Lawn mower blade sharpener could be used for sharpening mower blades to make the blade sharpness again.4. Easy to Use: Easy to install, fast and safe, simple and efficient, saves time and effort. Effectively provide your productivity.5. Package Content: 3pcs lawn mower blade sharpeners in package. Whether it is for own use or as a gift, this is the best for you.Specification:Item Type: Grinding Wheel Material: CorundumGrinding Wheel Diameter: Approx.56mm / 2.20inUpper Cap Diameter: Approx.30mm / 1.18inStem Diameter: Approx.6.35mm / 0.25in.Package List:3 x 4 Layer Grinding Wheel Note:1. Take protective measures when using.2. Please allow 1‑2in error due to manual measurement. Thanks for your understanding.