It's a mechanical arm; the model is divided into different objects, each one of them driven by an empty, so that it can be animated easily. the model is uv unwrapped, and has materials. The textures used were downloaded from www.textures.com, and you will find them in the archive Textures.rar.
I've used this model for my submission of the Dynamic Machines Community Render Challenge announced by Pwnisher, ended on the 1st of august 2021; I've added the video if you are interested.
I'm publishing this model for free with the hope of receiving feedback on it, so please, if you have any trouble with it let me know in the comments, constructive criticism is not only accepted, but also highly appreciated. I would also ask you to like the model if you do indeed like it, it always helps.
If you are interested in other 3D models you can visit my profile at https://www.cgtrader.com/maindivisa.
Have a nice day everyone : )