1. quality, durable material: The lawn mower blade sharpening tool is made of doublelayered corundum, which is extremely durable and suitable for longterm use. The version of the lawn mower blade sharpener differs from the old version. The version of the lawn mower blade sharpener makes the sharpening process easier, is sturdy, and longlasting. 2. You need to ensure your lawn mower is in condition to guarantee the efficiency of your mowing. Lawn mower blades need to be sharpened from time to time as they become dull or even rusty. 3. Wide application: The lawn mower blade sharpener can be used on dull lawn mower blades to restore their sharpness. It is used for sharpening lawn blades, lawn tractors, lawn mowers, rotary tillers, drill blades, sickle knives, etc. Fits most electric drills. 4. Easytouse drillmounted blade sharpener: The sharpener for dull lawn mower blades is specifically designed to be attached to a drill for sharpening lawn mower blades. Mount the sharpener like a drill bit onto your drill and install it in just 10 seconds to sharpen any dull blade. (Note: Electric drill not included).