First Aid „Kingpins“ One of the the most notable feature and benefit of the BRR-Trucks is the fact every single part is replaceable. With the different first-aid sets you can get the spare parts you are looking for. The First Aid „Kingpins“ set contains two Kingpins designed to fit the baseplate of your BRR-Trucks. Attention! : Regarding assembly of truck-parts make sure to read BRR-Truck-instructions first.