Infinikey Cabernet is a set of keycaps that is available to pre-order through a Group Buy.
Keycaps: The caps you put on your keyboard. Buying a set of keycaps does not include a keyboard. You need a mechanical keyboard with MX-style switches to put these on, which you'll have to buy separately.
Still have questions? Check out Keyboard University, which covers keyboard basics to learn more 🎓