Are yours from Ernst Manufacturing as I linked? Or something else? Many look alike but are not the same.
Ernst is molded into the front.
They do not fall out and still release with one hand if Ernst.
That wrench rack is rebranded by many other manufacturers, I recognize the design. The teeth, handle and screw holes are exactly the same, I just checked. The SK is green and has SK molded on the lower third instead of the top third. I guess you know the trick to get them out easily!
I haul my automotive tools in a milk crate and the three smallest sizes always fall out. That wouldn't happen if they were stored in a tool box, obviously. Other than that, it is great.