They help keep your rear suspension and drive units clean.
This listing comes with the following for all versions of the Arrma Kraton, Talion and Outcast:
One TBR Left Rear Mud Guard – Y218.1
One TBR Right Rear Mud Guard – Y219.1
Weight – 1.0 oz / 28 grams
Fits V1, V2, V3 2019, V4 2019