Fig. people or things of the same type or that are similar in character, attitude, etc. Jack and Tom are two of a kind. They're both ambitious. The companies are two of a kind. They both pay their employees badly.
Very similar individuals or things, as in Patrice and John are two of a kind-they're true hiking enthusiasts. This idiom uses kind in the sense of "a class with common characteristics," a usage dating from about a.d. 1000.