Warrior General Games

Is lower shoulder basically a boost to tackle breaking or is it just a break tackle move?

both
it contributes to breaking tackles, and the more you put into it, the more effective it is

So I am confused.

1) Does it factor into every break tackle roll?

OR

2) Does it need to activate and then it factors into a break tackle roll?

Say for example, could it compound making Stiff Arm more effective?

From what I understand it's a flat bonus to breaking tackles (similar to +% AE). Power through is a much higher bonus, but is roll-based.