Does anyone know what type of wrench this is??

Once you get your 6-point box wrench, one way you can get more leverage on the bolts is by interlocking two wrenches together, or a better approach is to slip a piece of pipe over the wrench.

 

Grasshopper, trust your Google_Fu, I sense it is strong.

 

PB Blaster will help until you put a torch on it, then it burns off and doesn't do f'all. Those bolt holes aren't blind, right? IE, you can see the bottom of the bolt on the other side? I'd heat the head of the bolt with a MAP torch and apply beeswax to the bottom of the bolt on the other side. Get the bolt hot enough and the beeswax will wick through. Keep at it long enough and you'll see the wax start to weep out from under the bolt head as it gets pulled through. At that point the bolt won't be stuck anymore.

If you add a cheater like @Crom recommends be sure to plan on how to deal with the wrench breaking. Is it going to send you flying into the hub or are you going to have a piece of pipe with a broken wrench coming at your face?

 

No. the (4) four captured bolts thread into the knuckle / spindle there is no access from the back side. Spec says 59 ft.lbf torque. Honestly, it aint that bad, just can't get enough leverage with regular length wrench...

 

If your box end wrenches are slipping off the bolt heads, next step would be vise grips.

And if you apply heat, apply it to the area around the bolt threads, not the bolt itself. It will make it expand and thus the bolt will become even harder to remove.