These are car bodies that can be fitted to 1/10 scale RC chassis or put on a display stand. The first car, the "Catmaw", is based on a Uro Vamtac ST5 and can be made into different variations, e.g. an hatchback or a pickup. The truck, the "Armadillo", is based on a Rheinmetall HX military truck. The car bodies have been designed to fit on an SCX10 III RC chassis, but there are others who have printed and fitted them to other chassis types as well. These are available to download from makerworld for free if someone is interested in printing them or using parts for other projects. More info and assembly guides are available from there too.
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I made a shop but will be adding some free stuff in the future:
https://www.myminifactory.com/users/WanderingShack