Rubbermaid Commercial Products, Industrial Grade, Easy Change Steelhead for Wet Mop with Wooden Handle, Floor Cleaning, 60 Inch

Can you clip a thick piece of cloth or a towel instead of the mop head?

What size mop head do you use with this?

How does this handle clamp down to hold the mophead in place?

Is this the full mop with the metal head clamp, or is it just the wooden stick? Not sure if what they call "mop head" here is the rag or the clamp.