“A small plier, around 15 cm, all metal, no markings. They have a spinnable top part. What is this used for?”
“I had one in art school. It’s clamped onto a tube of oil or acrylic paint and cranked to squeeze all of the expensive paint available out of the tube. Very helpful for starving artists.”
Small porridge crosiers were used like today's whisks.
#21 can also be a washing paddle a hand tool used to do laundry. It is made of wood, shaped like a baker's peel, but with a much shorter handle used as a grip. It was used to beat the wet clothes and linens, pushing out the dirt by hammering the items against the washboard, or against the flat slabs built into the laundry area.
And you know this from experience??