In article , says...

On 6/23/17 10:31 PM, DerbyDad03 wrote:
On Wednesday, June 21, 2017 at 7:02:26 PM UTC-4, Leon wrote:
https://www.youtube.com/watch?v=HbqZ...s#t=266.113364

What would be really cool is if they latched to the cart instead of each other
so that you could take any individual box out of the stack without removing
any others.

Hard to do...too much force where it would latch to the cart, but it sure
would be a cool feature.


That's exactly what the DeWalt boxes do. Check them out.
They slide on/off adjustable rails that are connected to the dolly.
Very cool... but expensive system.

The DeWalt system has two carts, a cheap one like the one shown in the
Milwaukee system and an expensive one that is as you describe.