HORUSDY10 Pack Spring Grip Mop and Broom Holder for Shovel, Rake, Broom, Mop Holder, Etc.

What is the diameter of the opening when closed? I have a tool with a small diameter (9mm) handle. Will it hold it?

Can you just slip the broom onto the grip or do you have to manually squeeze the spring grip open?

Where is this made?

Will these hold a garage broom handle that's 3 1/2" diameter