Product Description: Material:Corundum Diameter(outter):50mm Shank Diameter:6.35mm Weight:70G Color:Red, Orange Number of Pcs:1PC Package Included: 1 x Lawn Mower Sharpener Notes: 1.Transition:1cm=10mm=0.39inch,1g=0.001kg=0.0022lb=0.035oz. 2.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. 1/4" shank fit for most of power drills, practical and convenient. Widely used for sharpening lawn blade, drill blade, mower, sickle bar cutter, rototillers, and so on. It can simply attach to power drills and compatible with sharp your lawn mower blade nicely, very practical tools for daily life. The sharpening part is quite rough, makes it easy to sharpen the blade quickly, less time and less wait.