pik is a tool to manage multiple versions of ruby on Windows. It can be used from the Windows command line (cmd.exe), Windows PowerShell, or Git Bash. C:\>pik help commands add Adds another ruby location to pik. benchmark|bench Runs bencmarks with all versions that pik is aware of. default Switches to the default ruby. gem Runs the gem command with all versions that pik is aware of. help Displays