Commodore 64 Diagnostic Kit With double diagnostics/dead test Cartridge In Case. Kit includes diagnostics cartridge and test plugs for keyboard,user port, cassette port and joystick ports. Flip cartridge around and its a dead test cartridge. Everything you need to run diagnostics on hour computer. 3d printed cartridge case (now with the labels build into the case no more stick on labels like in picture)  .Side note: diag says kernal unknown because i have a custom kernal as seen in picture on my test bench computer ;) . But will recognize all the factory kernals that you can throw at it. Any questions feel free to send me a message. ****free cartridge holder**** (Carts in holder not included just deadtest and diagnostic cartridge) Over 200 kits sold and not one unhappy customer.