What wrench for the truss rod...

[VEGETATHEPUPPET]

Ok.... so.... Recently i changed strings in my Jackson DR7....
I bouth this guitar .. about a year ago on EvilBay... and it came without the wrench...
I dont have a wrench for the truss rod.. so i cant set it properly
I cant find it anywhere ... been to every shop... but seems they dont have it here.. (Poland... great...)

So how this wrench is called ? can u get it somewhere in the USA ..

or some member here has a spare one

Thanks

[kelly user]

allen wrench, buy a set at a local harware company, and figure out which one it is.

[Kisonen]

It's 7mm