That is not a kitchen tool. It appears to be an old medical/orthopedic apparatus, most likely a historical device used to immobilize or position a limb during treatment.

The wooden base, adjustable metal frame, pointed supports, and tensioning mechanism are characteristic of older orthopedic equipment. Devices like this were used before modern casts, braces, and specialized surgical tables became commonplace.

Because several antique medical instruments have very similar designs, I wouldn’t give the exact name from this photo alone with certainty. A photo of the underside, any maker’s mark, or a view showing how the metal frame moves would likely identify it precisely.

If you’re turning this into a “mystery object” post, a safer headline would be:

“This Strange Wooden Device Looks Like a Kitchen Tool—But It Has a Fascinating Medical History. Do You Know What It Was Used For?”