I bought 2 for only 1 strange purpose. To manipulate the electrically-operated driver-side window on my car without getting my fingers severed. The mechanism is kaput and the window will not close fully or correctly.
Upon arrival, I immediately tested one on a glass kitchen cutting board of some considerable weight. I pressed it down, squeezed the handles together and I lifted it with ease... the device that is... without even the slightest of an audible 'pop.' The glass board stayed on my table!! Then, with all the wisdom of youth, I remembered my old toy Bow & Arrows with those "sucker" tips -which wouldn't stick unless you WET them. So.. with a quick (possibly unhygienic) lick applied around pad edge I tried again...3-2-1 LIFT OFF... and the Board has cleared the Table !!!!
I tried it on the Car Window... a Postage stamp would have stuck, but these Pads refused to !
Do not count on them.