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Work ok on clean bulbs but it's hard to clean a very old dirty bulbs so there is a high chance of the old bulb not sticking once you have it unscrewed. Even the new bulbs pop off pretty easy. Thankfully my LED bulb was sturdy and didn't break even after taking a trip down a flight of wooden steps.
So first off, the product itself works great but I purchased this set along with the STAUBER pole, because I saw it had good reviews. I also figured since it was the same company, it should all work beautifully. The problem I've got is that the socket on these suctions cups is smooth but the pole is threaded. If I install a suction cup onto the end of their extending pole, I have to then use the screw it comes with to lock it in place. Problem is that it destroys the threads on the pole. Why 2 different systems like that?
This is a very useful product for changing bulbs but the largest one broke where the set screw tightens which left it to turn on the pole and couldn't turn out or in bulbs. I was able to use the medium one to change the bulbs. I was using fairly heavy Par 38 LED bulbs and some sockets made it difficult to change bulbs. You have to be careful with it and should work well.