I got the all switched weatherproof version.
Mounted on the firewall drivers side by the abs unit (2002 3500).
So far have used 1 for gauge 12v lines, 1 for US Gear D-Celerator 12v, 1 will run future relay coil for inverter heavy amp isolator.
Like the idea of each circuit having it's own fuse and you can change the fuse to a smaller value to run an individual circuit.
Seems well made, simple to install, well protected relays.
Bob Weis