If you don't have a 24mm socket, 15/16" fits fine.
To add to one other thing Chris mentioned, you need a T30 torx driver that is not the socket type to get the airbag screws out. It needs to be the screwdriver type so it's slim enough to fit in the holes in the back of the steering wheel. You also need a T10 (it can be a socket type) to get the steering wheel cover off.
If you don't already have some Torx wrenches it's good to pick up a a set of the socket type security Torx (with the hole in them) in case you need security type for something else (MAF) and use them for everything and get the single T30 driver.