Packing list: high-quality titanium alloy lawn mower blade, size 35mm * 18mm; thickness 0.75mm; weight 3g; 30-piece set; 30 screws. Product material: Robot mower titanium blades, robot lawn mower blade are made of high-quality stainless steel, high-quality titanium carbide alloy, unique process manufacturing with anti-rust, anti-breakage, anti-corrosion and other properties, the blade keeps sharp for a long time. (30 screws to prevent rust) Product use: High-quality titanium blades, universal automatic lawn mowers, robotic lawn mowers and other common brands and models of replacement blades. Due to the use of high-quality materials and unique manufacturing processes, titanium alloy blades are more widely used and durable. Easy Installation: Robot lawn mower titanium blades humanized design, with screws, double-sided blades, installation and removal can be used freely with only a screwdriver. (Due to the sharpness of the blade, keep it out of reach of children).