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, high temperature resistant and not easy to rust, this which effectively prevents the baffle from melting due to high temperature. Premium Grinding WheelThe sharpener is made of upgraded grinding wheel, stronger and wear-resistant, strong enough and durable so your mower blades have a clean, sharp edge again. We reshaped the shape of the grinding wheel so that the lawnmower blade sharpener will not collapse or break during use. Lawnmower Blade Balancer The lawnmower blade balancer is compatible with model 42-100, 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 trimmer! Easy to Use and Wide ApplicationElectric drill and hand drill can use it, the 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.