Those files/format can be imported into the vast majority of your favorite Softwares (Best recommended is FBX Format): _3Ds MAX / Maya / Lightwave / Cinema 4D / Blender / Daz 3D / Sketchup / Unity / Unreal Engine, etc...
Previews images rendered with Marmoset Toolbag 3.8
File Formats included:
Autodesk Maya 2018 (Arnold );
3ds Max 2018
Cinema 4D R19
substance painter 2017
Textures Formats: JPG (4096 x 4096) The model is PBR and contains Texture maps: