The Machine Block is a crucial component in most IC² recipes. It is made out of 8 Refined Iron, and can be turned back into it through crafting, in case one wants to regain the Refined Iron used to create it.
These multipurpose tools, known as Leet-Block M60, are the core element of ANY industrial device. In fact, they contain countless mechanisms, which can be easily adjusted to everyone's needs. You could possibly even craft it into a cake-generator, but hey, who would need one? Not me and therefore I don't have any blueprints for that kind of thingy, HAYO!