High Efficiency: Quickly sharpens blunt old blades, effectively improving productivity and efficiency. Double Layer: Made of double layer corundum material, strong and durable. The grinding stone won't be damaged due to high temperature during grinding. 10 Pieces: You will receive 10 pieces of double layer hand drill sharpening stones in total, meeting your different needs for replacement and sharpening. Easy Installation: These lawnmower blade sharpeners can be simply attached to power drills and sharpen the blade easily and quickly. Making the edges become more effective. Wide Application: Suitable for sharpening lawn blades, lawn tractors, mowers, rototillers, drill blades, sickle bar cutters, etc. Specification: Item Type: Lawn Mower Blade Sharpener Material: Corundum Application: Suitable For Sharpening Lawn Blades, Lawn Tractors, Mowers, Rototillers, Drill Blades, Sickle Bar Cutters, Etc. Package List: 10 x Lawn Mower Blade Sharpener