General description The CSPARKV 4pcs Double Layer Sharpening Stone Lawn Mower Blade Sharpener is designed for easy and efficient sharpening of various blades. This set includes four sharpeners that can be attached to electric drills, allowing you to restore the sharpness of your mower blades quickly and effectively. Technical specifications Diameter of sharpener: 2.2 inch / 5.6 cm Length of sharpener: 2.5 inch / 6.4 cm Material: Whetstone and steel Grinding wheels made of high-quality corundum Compatibility and accessories The sharpeners are compatible with most mowers and can be used for sharpening various blades, including lawn mower blades, drill blades, sickle bar cutters, tillers, axes, trimmers, and shears. Installation Installation is straightforward; simply attach the sharpeners to your electric drill for quick and easy use. Usage The sharpeners allow you to sharpen blades without the need to remove them from the mower, making the process efficient and convenient.