The Kona Classic is a 60% layout + left Function keys. Using a Teensy as the controller, the Kona Classic is provided as a do-it-yourself kit for left f-key enthusiasts.
See [build environment setup](https://docs.qmk.fm/build_environment_setup.html) then the [make instructions](https://docs.qmk.fm/make_instructions.html) for more information.