I think they are BASED off pics of Mooncrest keys but recasts? I suppose they could have shrink the molds but proportionally they are WAY too thin to be shrunken Mooncrest keys. By that I mean at the scale they are at the layers are still thinner by HALF of what they should be if they were Mooncrest recasts, and then the details I mentioned above as well as...well you see that triangular section with the circuitry looking design in it on the McCoy key? The KO looking key actually has that bulge UP in the center rather than keeping it flat. Really looks odd in hand.
In a way it's KINDA too bad as the material is very hard even at the thickness it's at so if they were full scale and still thin they would be pretty tough.