CONBOLA Suction Cup Hooks Heavy Duty 4 Pieces Car Camping Essentials Upgraded Tie Down Suction Cup Camper Accessories with Securing Hook Strong Power for RV Boat Window Glass Camping Trap.(4 pcs)

Fantastic! Stayed stuck for 2 weeks and still going strong! The suction is VERY strong, it takes Hercules to pry them off, and that's a good thing. These are NOT wimpy things that will come loose and fall of in a few minutes like all the others I've tried. I stuck them on the inside of my SUV's windows in the cargo area and attached bungee hooks and cargo netting pulling on them with a LOT of weight, 150 pounds of stuff pulling against them. It was asking a lot of them to hold that much weight & pressure with the straps pulling tightly on a long 2000+ mile week-long road trip. But they held perfectly! What a nice surprise they never came off even once, not loose at all, those babies were stuck and not going anywhere. I have not tried them on other surfaces but for clean glass in your car even with temp changes it holds incredibly strong!UPDATE: They are STILL stuck tight after ONE MONTH! I finally took them off and it was hard to pry them off, as in very hard, but that makes them good. One thing you will want to do is make sure you keep the plastic caps they come with covering the suction cups, as you will need to put them back on over the cups when you take them off whatever they were stuck to. This is because the inside of the cups are sticky with an adhesive type surface and without the covers they would get covered with stuff immediately and that would surely hurt their sticking next time you use them. So keep those caps, they are attached but if you cut them off like I did, make sure you keep them!

These worked perfectly for my application. Exactly as representedI've used these to easily secure the straps on my "tunnel tent" to my truck cap and a shade when I'm surf fishing at the beachThey held even through high winds and a torrential downpour that lasted hours.So impressed with this product they have "earned" a permanent spot in the trucks storage compartment

Great suction and is very sticky!

Now that’s it’s rainy season in South Carolina, I bought these to hold down a car tarp over a car in my yard. They work great and are good tie downs. The quality is great, and they held very well against the rains and winds.

Super strong suction. Used these on a camping trip to hold up a tarp on the side of my SUV—worked way better than expected.

These suction cups come with an adhesive on them combined with the suction ability on the lever. If you're not planning on taking them off they are probably great, however my use case was that I need to attach and detach them. They attached great, but were very difficult to remove without tools once they were in place. The adhesive seems like it will eventually wear out and the suction probably won't hold very tight once that happens.

These CONBOLA suction cup hooks are an absolute game-changer for car camping! The upgraded design and securing hooks provide incredible holding power, easily handling everything from securing tarps to hanging gear. Setting them up on my RV windows was a breeze, and they stayed firmly in place throughout our entire trip, even in windy conditions. If you need reliable and heavy-duty suction cups for your adventures, look no further – these are a five-star essential!

Wow - these stick really well (almost too well if that can be a thing) I used it instead of staking down to put the tent against a car and worked better than imagined.