The former Roma defender joined the Nerazzurri this week.
Kolaro, 35, said, “It's true that I was close to Inter a couple of times before, but I finally managed to arrive.
“It was an easy choice for me, as I didn't think twice when I received the call from the club and happily accepted. I already knew many of the players, we faced off several times as opponents too, so I had a positive impression of them.
“(Antonio) Conte's presence certainly influenced my decision, as he won straight away when he was in England and last season changed Inter completely. I hope we can do well together and try to win."