The knife sharpener has a high quality grinding wheel, which is strong and strong enough to give your mower a clean and sharp edge; Easily get sharp edges on the lawn mower blade without cavities or bumps ; keep blade balance; 1/4 inch shank fits every bit; built-in guide creates correct edge angle, permanent grinding wheel; Intended Use: Works on most clippers without removing the blade - have your blade looking like new in less than 10 minutes;Suitable for most shredding operations eg. Such as kitchen knives, knives, razors, carving knives, precision tools, garden tools and art tools, but without serrated blades or ceramic knives.Product DetailsProduct Name: Knife sharpener Quantity: 5Material: Natural corundumSize: UniversalPackage Included:5 * Lawn Mower SharpenerPrecautionsDue to manual measurement, deviations may occur. Note: The data are all manual measurement, please allow 1-3cm error, due to Due to the light and display difference, there will be some color difference, depending on the physical item received.