old cutting blades on motorized robotic lawnmower. dirty and rusty lawnmover blade ready to be replaced by a new one

blade cleaning concept cutter debris detail dial dirt dirty dry equipment free gardening grass gunk hands holding imbus inbus knob lawn lawnmower layer machine maintenance modern mower mud outside professional removing replacement robot robotic screw seal service shiny soil stripping stuck summer sweeping technology tool ugly use using wheel work worn yard yearly