Like a crab or lobster claw...it's not letting go..
Ordered these as a supplement to the 2 car covers I ordered. Since both vehicles will be kept outside most of the time, and we do have strong winds in the fall and in the spring, I wanted something that would at least prevent the covers from catching a gust of wind from underneath and then filling the cover like a balloon and having the cover fly away..
When installed under the bumper just before the wheels on my sons MR2 and at the rear at almost the same location, the wind clamps work well. They keep the cover snug and prevent the edges from becoming loose. So far so good.
Happy with the purchase, and I'd recommend these for any outdoor cover.