New Upgrade BaffleCompared with the old version, the metal baffle at the bottom of the new lawn mower blade sharpener is made of aluminum alloy, which is high temperature resistant and not easy to rust, which effectively prevents the baffle from melting due to high temperatures. Premium Grinding WheelThe sharpener is made from upgraded grinding wheel, stronger and wear-resistant, strong and durable enough to keep your mower blades clean and sharp again. We've reshaped the shape of the grinding wheel so the lawnmower blade sharpener won't fall apart or break during use. Lawnmower Blade BalancerThe lawnmower blade balancer is compatible with 42-100 model, ensures even sharpening of the lawnmower blade. According to different cutter diameters, you can choose different diameters on the cutter holder for the balance test. A balanced blade creates a clean cut and reduces vibration to increase the life of your clipper Easy to Use and Wide ApplicationElectric drill and hand drill can use it, stones sharpen blades easily and quickly, less time and less waiting Widely applied for sharpening grass blade, drill blade, mower, sickle cutter, tillers, hoe, etc. What You GetYou will get 3 x Lawn Mower Blade Sharpener, 1 x Lawn Mower Blade Balancer. Lawnmower sharpener size: 2.4 x 2 inch, suitable for most electric drills, which is designed with perfect balance of rotation, convenient and practical.