Mudguards for the rear wheels to prevent soiling from whirled up grass cuttings.
The mount is placed over the axle and secured at the bottom with a screw. The mudguard is pushed over the dovetail onto the mount.
I've printed them with 0.2 Layerheight, 4 Perimeters, PLA+, supports and a skirt (see attached pictures)
https://www.ebay.de/itm/135642872835
The author marked this model as their own original creation.