Today while doing a bit of remodeling to the interior of my safe, one of my shelves decided to fall. The clips failed. The design (due to the weight) allowed them to compress, and disconnect from the tracks. Mild steel garbage. They look like the image. I'm looking for something stronger. Something that does not have the ability to compress under weight. Suggestions for better replacements? Worse case, I'll have to change out the tracks and upgrade for a better shelving system. I'm trying to avoid that if I can.