Product description Color:Gold 30 /45 pcs Carbonized steel Spare blades - suitable for all Auto mower husqvarnanbsp; modelsnbsp; Application Note 1.The blades are extremely sharp, please note this during assembly. 2. If the cut looks uneven and unclean, it is time to change the blades. Please always exchange all used knives for a new spare blade! 3. We recommend replacing the screws directly when changing blades. 4. Turning the blade over does not make sense, as the direction of rotation of your robot lawnmower normally changes. Feature? 1.[SMOOTH CUTTING IMAGE]: Due to the thickness of 0.75 mm and a weight of 3 g, the replacement blades for Auto mower produce a consistently consistent and smooth cut. The axle load is NOT affected by the slightly higher weight! 2.[LONG SERVICE LIFE]: The blade set is made of Carbonized steel , which ensures a long service life. The enclosed screws are also STAINLESS! 3.[HIGH SECURITY]: Robotic Spare blades for Auto mover can not break through the use of high quality materials. Even if the blade meets resistance (stones or similar) - ideal for the safety of animals and children! 4.[ WEATHER RESISTANT]: Our knife set for husquana lawn mower knife set has by the coating on an extremely good weather resistance. This way your mowing robot can do its work efficiently and efficiently even on bad days - the ideal spare part!