Changing Disc Brakes- Any Special Tools?

[monkey_wrench]

Hi,
I've changed Disc brakes before, but have got half way through a job, only to find that the manufacturer has kindly used a 'special' socket, meaning it's required me putting all things back together and driving the car to buy the right tools...

The question is, can anyone tell me if I need any special tools to change the front disc brakes- any unusual fittings (like a torq fitting for example).
French manufacturers seem to like using obscure things!

Car is: Citreon Saxo X, 1997, 1L, 3 door