Spotted this U-shaped tool with multiple metal blades in my grandmother’s baking bin. It has a wooden handle but looks like some kind of strange knuckles.

1. The Mystery Tool: A Closer Look At Its Shape And Blades
Upon closer inspection, the tool reveals itself as a U-shaped device, typically measuring about 5 inches in width, with a handle that fits comfortably in the palm of your hand. The handle is often made of wood, sometimes polished to a smooth finish, and the blades are spaced evenly apart, usually around 0.5 to 1 inch from each other.
The metal blades, often stainless steel, are not sharp like a knife, but are sturdy and slightly curved. This curvature allows the tool to rock back and forth or side to side, making it easier to cut through ingredients. The number of blades can vary, but most commonly, there are five, providing enough strength and coverage to perform its task efficiently.