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, effectively preventing the baffle from melting due to high temperature. Premium GrindstoneThe sharpener is made of an upgraded grindstone, which is more durable and wear-resistant, strong and durable enough to keep your mower blades clean and sharp again. We have redesigned the shape of the grindstone so that the lawn mower blade sharpener will not collapse or break during use. Lawn Mower Blade BalancerThe lawn mower blade balancer is compatible with the 42-100 model, ensuring even sharpening of the lawn mower blade. According to different cutter diameters, you can choose different diameters on the cutter holder for balance test. A balanced blade creates a clean cut and reduces vibration to increase the life of your mower! Easy to Use Wide ApplicationBoth electric drill and hand drill can use it, the stones sharpen blades easily and quickly, less time and less waiting! Widely applied for sharpening lawn blade, drill blade, mower, sickle cutter, tillers, hoe, etc. What You GetYou will get 4 x lawn mower blade sharpener, 1 x lawn mower blade balancer. Lawn mower sharpener size: 2.4 x 2 inches, suitable for most electric drills, which is designed with perfect rotation balance, practical and convenient.