Review on High-quality Heavy Duty Suction Cups for Screen Repair - Compatible with iPad, MacBook, iPhone, Samsung, and More by Trevor French

They were purchased to make it easier to remove the protective glass from the 27" iMac. The suction power was way better than I expected and it made the whole repair that much better. It should be noted that the listing says '6 packs' which it doesn't the best description is. It is actually "6 pieces" which includes 2 suction cups, two blue levers, one black long lever and a cloth. When you say "6 packs", it sounds like you suck 6 times , which is actually not the case. Be aware of that.