Found this smooth wooden object in an old sewing tin. Shaped like a mushroom but the handle is too short to be a pestle.

mended.
9. Caring For and Restoring Old Wooden Sewing Tools 
To preserve the integrity of vintage wooden sewing tools like the darning mushroom, regular care is essential. Clean the wood with a soft, damp cloth to remove dust and grime. Avoid soaking the wood, as moisture can cause swelling or cracking.
Periodically, apply a light coat of mineral oil or beeswax to nourish the wood and maintain its smooth surface. This will also help to prevent drying and cracking, ensuring that the tool remains functional and beautiful for years to