Smooth Cut: Extra-sharp replacement blades for automatic lawn mowers ensure an even and smooth cut of the lawn. Easy to replace, just replace the blade with a screwdriver. Upgraded packaging: With plastic packaging, the box can be recycled to protect the blade, easy to carry and store. Safety: Due to the solid stainless steel material, the blade of the robot lawn mower is not easy to break when used with hard objects (eg stones) and can be used safely. Don't worry about the blade suddenly flying off and hurting people. Weatherproof - With a special titanium carbide finish, the trimmer blade is rustproof and weatherproof, allowing it to to self-clean easily by turning on its own. This allows your robot lawn mower/robot mower to mow effectively for a long time, even in bad weather. Sharp blade: The robot lawn mower blade has two sharp edges which provide more efficient cutting performance. In addition, the sharper blade cuts more grass, which reduces the frequency of blade changes and increases the efficiency of the machine. Note: The data is manual measurement, please please allow 1-43cm error, due to the light and screen differences, there will be a certain color difference, the specific received in kind prevail.