Since .rar is a compressed archive format, you will need a utility to extract the contents. Common tools include: How to open a .RAR file in Windows using 7-Zip
If you are trying to rename or provide a "proper text" description for this file, here is the relevant product information: Brand : Badland Item Number : Product Name : 12,000 lb. Winch Hitch Mount 57607.rar
is the specific item number used for this product by Harbor Freight . 57607.rar