How do I know if I have a Fixed Exhaust or a Multi-Directional Exhaust tool?

The "Fixed Exhaust" can be identified by stationary holes on the front of the cap on the top of the tool. The "Multi-Directional Exhaust" tools will have a rotating disc on the top of the cap, so that the exhaust can be directed anywhere the operator wishes. Some directional exhausts are tool-free operation, and some require an allen wrench to loosen.