Dull mower blades rip and pull the grass, leaving ragged tears that both weaken the plant and promote fungal growth and other grass diseases. Sharper mower blades allow you to mow quickly and efficiently for a perfectly smooth lawn. Easy to use, simply attach it to your power drill. Quickly produces a perfect cutting edge on blades in just a few minutes. The unique grind shape sharpens any lawn mower blade at the perfect angle. Works for any lawn mower blade size from push mowers to riding mowers. Made of extremely durable materials from high quality corundum. Lasts a long time to sharpen blades over and over again. Your lawn mower blades will last and stay sharper longer, with less stress on your lawn mower engine. Built-in guide produces proper edge-angle; permanent grinding stone. Brings back original blade-edge sharpness, helps eliminate blade nicks from rocks & sticks. Specification Product size: width 2.1 inches, height 1.9 inches, handle diameter 0.9 inches Color: Blue Package includes: 2pcs*Lawn Mower Sharpener