Application and Compatibility For models such as: S300 S500i M500 M700 M1000 M1000i M1200i L1500 L1500i L2000i ID B M800i M900 S500i S Basic S450i S700i, WR130E M WR141E M WR142E M WR1453E etc. Premium Material Made of premium stainless steel with titanium coating. Titanium coating provides excellent rust resistance, good wear resistance, and long service life. Most Precise Cutting Results Enjoy a unique and consistent smooth cut: Our replacement blades are specially hardened, specially sharpened, and cut more precisely than ever. Superior Quality and Durable Replacement robot lawn mower blades are finely polished, extremely thin, and sharp – 1 mm thick. Comes with new Dacromet screws. These blades do not require frequent changing. They won't rust, break, or lose sharpness easily. High Safety Replacement blade for robot mower – Thanks to the premium material, these blades are more resistant to breaking, even when encountering obstacles such as stones. Ideal for pet and child safety.