[sdiy] Aluminum Thickness for Brake/Shear?

[jays at aracnet.com]

I'm looking into getting one of those small, metal brake/shears to make
L "trays" to mount PCBs and front panels together.

So I was wondering what thickness of aluminum people are using to do
this?

Don't want to get anything that can't handle the thickness I need.

Also if someone could recommend a bench top hand brake/shear that
wouldn't be bad either.

Thanks for the help.
Jay S