【Application and Compatibility】For models such as: S300 S500i M500 M700 M1000 M1000i M1200i L1500 L1500i L2000i ID B M800i M900 S500i S Basic S4 50i S7 00i, s WR130E M WR141E M WR142 E M 143E M WR153E L WR155E etc. Premium Material: Made of high quality stainless steel with titanium coating.Titanium coating ensures excellent rust resistance, good wear resistance and long service life. 【Precise Cutting Results】Enjoy cutting with unique and consistent smoothness: Our replacement blades are specially hardened, specially sharpened and cut more precisely than ever before Premium quality and durable: The replacement blades for robotic lawnmowers are finely polished, extremely fine and sharp - 1 mm thick.And equip new Dacromet screws.These blades do not need to be changed frequently.They do not rust or break and stay sharp for a long time. High safety - Replacement blade for robot mowers - Thanks to the high quality material, these blades are harder to break.Even if the blade is on resistance (stones, etc.).Ideal for pet and child safety