I don't think it matters wether its 1\2 inch or 3/4 inch but maybe 3/4 would be stronger but the overall price might decide which one to go for but either would be fine.
Again As for hex 6 point /bi hex 12 point Im not sure but any ones I was looking at was all bi hex 12 point i think. What's your thoughts on this?
Price budget is a big factor, I will mostly only use it for car wheel hub nuts and as I service our family cars it will mostly only be used once maybe twice a year so I don't Really want to spent a fortune on this but at the same time I want something that will do I the job when required so I don't really know about the budget but basically the best deal I can get under the £100 mark if possible.
It's got to be hex for me, bi hex is useless on those very stubborn hex bolts and likely to chew them up! There are occasions though where you get bj hex bolts, can't say I remember of any ford having them..
What about something like this,
Then you could get a 600mm breaker bar from halfords to go with it!