I really wasn't sure when I ordered these. I'm use to D-Rings being metal so the fact that these were plastic had me questioning my decision to order them. I have to say, I was very pleasantly surprised by the fact that they are much stronger than expected. They are also much harder to open than some of my other D-rings that are metal. The fact that they can hook on straps and stay there without interfering or affecting the d-ring part at all is also amazing. I have already begun using them with our various travel gear and have to remind myself to hold some of them out so that I have them for the new travel bag and new harness that I'll be getting. I'm also planning to use them in the truck so that things stay in place better while driving.