Tone-neck pickup
Tone-middle pickup

On mine at least.
Quote by bass guy 129
well i know eric johnson strats go bride and neck, but i was wondering about standards.

Like Danno13 said.
On MIA strats the bottom tone control is for the middle and bridge pickup; and on the Eric Johnson and the Jimmie Vaughan strat it is for the bridge pickup. Then some models have a master tone; and the bottom control is some sort of effect (like mid boost on the Clapton and Buddy Guy strats).