Hello Geogu3 and welcome to the forums
Your guitar will be fitted with a Bi-Flex truss-rod (2way) and you can use either a 5mm short neck Allen Key or 5mm Hex-ball driver both available from good hardware or autopart stores.
I find the short neck Allen Key (wrench) is easier to use for this type of truss-rod nut.
I hope this helps, if you need anymore just call
Cheers
JB