I have a favorite product that I am willing to call definitive for its category.
I've had it 22 or so years.
I rank it ahead of the SOTA Reflex Clamp because it weighs less and does the same thing. It's also easier to adjust the amount of downpressure.
Of course I forgot to take a pic of my favorite record mat!
Anyway, if you ever come across one of the Maplenoll clamps, grab it. I promise you won't be disappointed.