An Original Krystal consists of a grilled mini beef patty, diced onions, mustard, and a dill pickle slice, on a steamed bun.
The way the promotion works is you get four sliders and an order of fries to start and once you finished the first batch, you can keep going back to the counter to pick up two more sliders (and fries) until you're done.
The limited-time, all-you-can-eat deal is available from 6 AM to close at participating locations, while supplies last.
Photo via Krystal.