I have the post trays in my box too, triples for the 1/4 & 3/8” (Shallow,semi & deep) and 2 of the double rows for 1/2” (6 & 12pt).
The twist lock has my impact sockets & planning to put mostly all 1/2” drive on this tray with the impact swivel sockets too
Don’t like the sockets laying down, they take up too much space.