You can download it for free from the WinRAR website. Using it for free is a whole other matter, which involves software piracy that is against the rules to discuss here.
However, there is the free 7-Zip program which can read RAR archives. Not sure if 7-Zip is being actively maintained anymore, but it's probably your best free AND legal option regardless.
One of the best French door fridges we've tested
A good-looking fridge with useful features like an auto-filling water pitcher and a temperature-adjustable "FlexZone" drawer. It was a near-flawless performer in our cooling tests.