General description vhbw offers a clever solution with its 18x replacement blades designed for high cutting performance in robotic lawnmowers. These durable blades ensure a perfect, clean-cut lawn with an even surface, making them ideal for maintaining your garden. The robust and practical design allows for thorough mowing, and the blades can be easily and quickly fixed in place using the enclosed screws. It is recommended to replace all lawnmower blades simultaneously for optimal results and balanced axle load distribution. Technical specifications Thickness: 0.75 mm Dimensions (length x width): approx. 35 x 18 mm Length: approx. 35 mm Mounting hole diameter: 5.3 mm Weight (total): 43 g Sharp on both edges Material: steel Colour: silver Width for central bore: 8.3 cm Compatibility and accessories Compatible with: Greenworks Optimow S, Optimow M, Optimow 7 Replacement for: AR1, 4087-20, 502 12 78-02, 535 13 87-02, 535 13 88-02, 577 60 64-02, 577 60 65-02, 577 60 65-04, 577 60 66-02,