: The .rar extension indicates it is a compressed archive created with WinRAR . The "-part1" suffix means this is only the first segment of a multi-part archive; you would need all subsequent parts (part2, part3, etc.) in the same folder to extract the contents.
: If you have the file, open it with a compression tool. Often, there is a README.txt or file_id.diz inside that describes the software or content. 3985ir95m86n8tr848485-part1-rar
Since the name itself doesn't reveal the content, you can try these steps to find its "features": 3985ir95m86n8tr848485-part1-rar