A tube-shaped kitchen implement designed to remove the core, with its seeds and tough membrane, from whole apples and pears in a single motion. The cook centers the serrated cylinder over the stem end, pushes firmly through the fruit, and twists to extract a neat plug, leaving the apple intact for baking, stuffing, or elegant presentation. It exemplifies the single-purpose tool: useless for anything else, perfect for its job, and beloved by bakers who prepare dozens of apples for pies and tarts. Variants combine coring with slicing or peeling for higher volume work. While a paring knife can do the same job with more skill and more waste, the corer delivers speed and uniformity, which is why it persists in drawers despite the minimalist kitchen movement.