Review on 🔧 FCHO Heavy Duty Aluminum Glass Suction Cup Plate Puller Handle Hooks for Glass Lifting and Tile Installation - Car Dent Puller Suction Cup - 2 Pack, Black by Justin Olson

The materials and design make this suction cup look like it could easily outlive its owner. "Suction", once set, will go nowhere until intentionally turned off by opening the knobs. Closing the handles to create suction on any really flat smooth surface I personally wouldn't rate as "easy to use" (4 stars out of 5) due to arthritis in my left hand. Undoubtedly two-handed work: Pressing the cup against the surface and closing the two handles at the same time required a small manual twist at first, but it worked straight away. I agree with the advice of the customer service representative to be careful not to pinch your fingers when closing the handles with the fairly powerful spring, although I avoided this risk without advice, just by paying attention. I am currently using 2 of the almost 5" cups to add extra stability to my acrylic shower stall, although I did notice a small dent in my car door to allow it to be pulled out. Maximum suction power on acrylic shower walls. Just in case, before applying the mugs to the surface, I wiped the rubber down with denatured alcohol, let it dry, and then dampened the mugs with tap water before squeezing them down and closing the handles. Well designed and made from durable materials - highly recommend.