Great gadget
These work perfectly in keeping Plexiglas on the inside of the garden shed Windows in the winter to help keep out the cold when working in there.  I really like these - they keep the Plexiglas in place firmly but when I want to remove the Plexiglas it is easy to remove them without unscrewing these fasteners.  When new these are a bit stiff and take a firm pull but they they loosen up and are much easier to use.  Had bought some years and years ago but didn't get enough.  Have been looking to buy more for years and have seen the price go up and up so finally stopped procrastinating and decided to buy now before the next price increase.
Rating: 5 stars