I have a need to fit a pair of small 2.1m wide farm style gates, with
7 inch sq wooden posts.

I also have 2 sets of farm hinges, the ones with square shanks that
you drive in.

1 - What size hole do you drill ??
2 - Both hinge pins have to point upwards, so how do I stop gate
thefts ??
3 - Whats the best step by step method of erecting the posts and gates
??