You need a 14mm allen key to fit the cranks. To remove the cranks, you need automotive crank pullers. There's an explanation of the process by Leonard Zinn here. Compared to SRAM and Shimano cranks (SRAM in particular, which require only one 8mm allen key to install and remove) it's a massive PITA.
And because Campag do Ultratorque which also just needs an 8 mm allen key to install and remove.
And because Campag do Ultratorque which also just needs an 8 mm allen key to install and remove.