Cdrl-016.part1.rar | INSTANT |

You cannot open just "Part 1." Ensure all parts are downloaded and numbered sequentially before attempting to extract.

"CDRL" is also a common prefix used by specific release groups for adult media or specialized video series. CDRL-016.part1.rar

The .part1.rar extension indicates that this file is incomplete on its own. You will need "CDRL-016.part2.rar" (and potentially more) in the same folder to successfully extract the contents using a tool like WinRAR or 7-Zip . You cannot open just "Part 1