I screwed up one of them the first time. I was TIG welding 2" x 2" x 2" boxes and forgot that magnets really don't like heat. Well, a couple of oven mitts later and the magnets on one of them are too weak to hold anything now. However I am a problem solver so I can easily take out and replace these little magnets.I would like the hinge to be a screw or other adjustable device.Some of the holders I received had hard pivot points and others were very loose. When I tried using them to hold the mount I had to swap them out as I didn't find the hardest to hold it in place.