I bought 4 of these clamps and although they are very similar there were 2 different models. One clamp had rubber seals and the other 3 didn't. The quick-release mechanism is also slightly different in the two different styles. I don't care about rubber bumpers, so I don't care. You might not want to rely on the ones that come with pads. The brackets are bigger than I thought, but that's not a problem at all. They are strong and will hold a lot more things together than a simple C clip. It was a good buy.