The knife sharpener has a high-quality grinding wheel, strong and durable enough to make your mower a clean and sharp edge; Easily achieves sharp edges on the lawn mower blade without cavities or dents; keep the blade balance; 1/4 inch shank fits every drill bit; built-in guide creates the correct edge angle, permanent grinding wheel; Intended Use: Works on most mowers without removing the blade - make your blade look like new in less than 10 minutes; Suitable for most grinding operations, e.g. As kitchen knives, knives, razors, carving knives, precision tools, garden tools and art tools, but not serrated blades or ceramic knives. Quantity: 5 Material: Natural Corundum Size: Universal Package Included: 5 * Lawn Mower Sharpener Precautions Due to manual measurements, deviations may occur. Note: This does not include other things, the color is based on the first picture, and the other pictures only show the effect. Due to the differences between different monitors, the picture may not reflect the actual color of the item.becomeveryrich