This is an all-in-one adjustment tool for the Rockford Fosgate and any other amplifier that uses a 3mm key to adjust set screws. I added a hole in the back for a 3mm Allenkey. I Cut the shank of my 3mm Allenkey and heated it with a torch to make sure it was firmly seated. It is nice to have one tool to make all the adjustments instead of needing 2. I shortened the flathead side of the tool to make it a bit easier to fit into tighter spaces around wires.
The author remixed this model.
I shortened the overall lenght of the key to make it easier to adjust around wires. I also hollowed out a 3mm hole in the back to insert a 3mm hex/allen key.