The three short prongs poke into a hunk of cheese to grip it without stabbing so deep that the cheese would begin to crack or tear, so you can slice the cheese without using your hands to hold it. Meanwhile, the knob is big enough to hang onto easily.
Not a big deal to touch a hunk of cheese with your (clean) bare hands if you're making grilled cheese sandwiches for the family, right?
But if you're serving guests or have a cheese board set up where guests can slice cheese for self-serve, they might be happier not to have everyone's fingerprints all over every wheel and brick of cheese on the board.
This obviously isn't something everyone needs, but it's kind of cool-looking, doesn't take much storage space since it's only 2 1/4 inches tall, and turophiles will no doubt love it.
The product was supplied for the purpose of a review on Serious Eats; this was previously published on Serious Eats.