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.

a pastry blender, look for several key features. The U-shaped design with a wooden handle and multiple metal blades is a strong indicator.
Additionally, the blades should be slightly curved and evenly spaced. If the tool feels comfortable in hand and the blades align for a rocking motion, it’s likely a pastry blender. The lack of sharp edges further distinguishes it from any cutting tool or weapon.
8. The Baking Jobs This Odd-Looking Tool Is Perfect For
The pastry blender excels in creating various doughs that require fat to be