If it has ridges: It’s likely a washboard. Look for a frame with metal or glass ridges.
If it has rollers and a crank: It’s a manual wringer. These often attach to the side of a tub or basin.
Materials: Older versions are typically made of wood and metal, while newer ones might incorporate rubber rollers or glass ridges.
Both tools were essential parts of doing laundry before the invention of electric washing machines, especially in the 19th and early 20th centuries.
Let me know if you want help identifying it further or learning its value—antique laundry tools are often collected for their charm and historical significance!
