Hi, What is the meaning of twins and same barber in the following text?

"At nine the next morning, two FBI agents banged on the door. Eventually, Clete staggered to the door and demanded, "Who the hell is it?"

"FBI. Open up. "

Clete cracked the door and peered over the chain. Twins. Dark suits. Same barber.


The speaker is making a funny observation. The idea is that FBI agents all have a certain look and dress a certain way. These two agents follow the "company rules" so closely, you can hardly tell them apart.

Thanks for the reply.