Well really if you wee trying to economize, and use the least amount, you could just use the 1/2 inch socket wrench and then reduce down to 3/8 and 1/4 where necessary. So you figure there is 3 with about 8 sockets and I would throw in one extension, so you have 12. I would also throw in a phillips socket. So that would make a lucky 13. That may be an oversimplification ... but somewhere around there?
