Use the disc at your own risk! I expressly point out that this is not an original cutting disc . I cannot accept any responsibility for damage to people/animals or machines that may be caused by using the disc! Warranty claims from the manufacturer of the robotic lawnmower will be void if this blade disc is used. Never reach under the robotic lawnmower when it is mowing! If you want to check the blade disc, the robotic lawnmower must be switched off!