[STANDARD SPECIFICATION DESIGN] Lawn mower blade size: 1.37x0.7x0.02 inch, with a central aperture of 0.28 inch, included 18 * blades, 18 *screws. The precision of the process results in minimal errors, making it a perfect replacement for old blades and ensuring efficient operation of the lawn mower. [HIGH-QUALITY MATERIAL] Robot lawn mower blades made of high-quality stainless steel with titanium coating, the blade is a double-sided blade, excellent corrosion resistance, less prone to rolling and wear, the screws are easy to install and change, and has a longer overall service life. Good cutting performance, the perfect cut keeps your lawn clean, green and healthy. [COMPATIBLE MODELS] The knives are perfect fit for Worx: S300 WR130E, M500 WR141E, M500 Plus WR165E, M700 Plus WR167E, L800 WR148E, L2000 WR155E. Einhell Freelexo 400 BT, 550, 500 BT, 1200 LCD BT etc. multiple lawn mower models, check if the models match before purchasing. [EFFICIENT CUTTING] The robot lawn mower blades bring you more efficient cutting performance. Sharp blades can cut more lawn area, which means they reduce the frequency of blade replacement and improve machine efficiency. They are an efficient assistant for you to take care of your yard, trim grass and trees, and enjoy easy work. Blade:Sharp, continuous bending Color:Gold Material:Stainless steel Package Contents: 18 x replacement blades 18 x screws 18 x washers