CattleRustler explained the sentence grammatically, but I think you wanted an example of its usage, right? You leave your hat in a restaurant & you phone them. They keep your hat. The manager says, "The waiter is here until 11PM. Please come back. He will have it for you." Or You order a book. The store leaves you an email to say that is now available. They write, "Our Saturday clerk is John Jones. He will have it for you:"
Yeah, I wasnt sure which he meant, so I chose grammar. The reason I did is because i saw the object pronoun usage, and I know its often confusing when you first encounter it, so I thought maybe thats what he was asking about. Well at least between us, we covered both bases ;)
English future tense does not use "has". Instead it is "will have" or "shall have" http://grammar.about.com/od/alightersideofwriting/a/shallwillglossary.htm