Surikens were indeed sharp, round, and pointy. Though this wasn't enough of a description to make Sai positive that Usopp knew what he was talking about, it was close enough. The pirate was at least fairly competent.

He nodded in response to just about everything the other man said. "Yes. Thank you." This was a good partnership - would be highly beneficial to both of them if things worked out. Was that the way most friendships worked?