Product Description: Material:Corundum Size:57 x 50mm / 2.2" x 1.97" Color:As the Picture Shows Shank diameter:1/4" Number of Pcs:4Pcs Features: 1. Made of corundum, not easy to break, also strong and sturdy enough to make your mower get a clean edge and compatible with sharp again. 2. Widely used for sharpening lawn blade, drill blade, mower, sickle bar cutter, rototillers, and so on. 3. Size: 57 x 50mm / 2.2" x 1.97" for each one. 4. 1/4" shank fit for most of power drills, practical and convenient. 5. It can simply attach to power drills and compatible with sharp your lawn mower blade nicely, very practical tools for daily life. 6. The sharpening part is quite rough, makes it easy to sharpen the blade quickly, less time and less wait. Package Included: 4 x Lawn Mower Sharpener Notes: 1. Transition: 1cm=10mm=0.39inch, 1g=0.001kg=0.0022lb=0.035oz. 2. Please allow 1-3 cm difference due to manual measurement and 3-5 g for the difference between different colors. 3. Due to the screen difference, the color may be a little different from what you expect, please allow it. Made of corundum, not easy to break, also strong and sturdy enough to make your mower get a clean edge and compatible with sharp again. Widely used for sharpening lawn blade, drill blade, mower, sickle bar cutter, rototillers, and so on. Size: 57 x 50mm / 2.2" x 1.97" for each one. 1/4" shank fit for most of power drills, practical and convenient. It can simply attach to power drills and compatible with sharp your lawn mower blade nicely, very practical tools for daily life.