General description vhbw replacement blades are designed for high cutting performance, ensuring a perfect, clean-cut lawn with an even surface. These durable blades are suitable for various Greenworks robotic lawnmowers, making them an essential spare part for maintaining a neat and tidy garden. The blades can be easily and quickly fixed in place with the included screws. For optimal results, it is recommended to replace all lawnmower blades simultaneously to ensure balanced axle load distribution. Technical specifications Thickness: 0.75 mm Dimensions (length x width): approx. 35 x 18 mm Length: approx. 7 cm Mounting hole diameter: 5.3 mm Weight (total): 146 g Material: steel Color: silver Width for central bore: 9.5 cm Sharp on both edges Compatibility and accessories Compatible with Greenworks Optimow 5, Optimow 4, Optimow M, Optimow 7 Replacement for: 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, 577 60 66-03, 577 86