LEIGAO Features:quality.50 x 47 mm / 1.97 x 1.85 inch (DL); the lawn mower blades sharpener are designed with prefect spinning balance.It can sharpen the blade easily and quickly, less time and less wait. It can save your time and your energy. A good helper for lawn mower and lawn tractor' blades.Made of corundum, they can serve you for a long time, not easy to break, durable and strong.1/4" shank fits any power drill; built-in guide produces proper edge-angle; permanent abrasive stone.For sharpening lawn blade, drill blade, mower, sickle bar cutter, rotor tillers, hoe and so on. 1/4" shank fits any power drill. Specification:Material: corundumColor: blueSize: 50x50x 47mm /19.69x19.69x18.50inchShank type: round shankShank diameter: 6.35mm (1/4inch)(Note: Please allow 1-3mm error due to manual measurement, and slight color difference caused by light and screen.)The package includes1pc x Lawn mower blade sharpenerNOTE:The actual color and shape of the item may look slightly different from the images due to technical improvement and manufacturing variation or the color difference of the computer screen.