We have two sets of these in constant use around our RV’s exterior. Heavy duty does not begin to describe them. Each suction cup is capable of supporting up to 22lbs, which means that you can trust them to securely hang towels, toys, tools, lights, cameras, screens, and more, so that your RV setup is exactly what you want it to be. No need to worry about them losing grip – the upgraded super suction cup uses high-quality materials for maximum strength and durability. They are hard to remove, (but that’s kind of the point) and they do not leave any damage to your installation surface after use. Just push the suction cup onto a smooth surface, rotate the handle to lock, and you’re good to go! Plus, with the added bonus of a worry-free and durable usage guarantee, you can’t go wrong with these versatile and reliable suction cups!