Pneumatic brake and clutch assemblies are equipment drive components that consist of pneumatic brakes for slowing or stopping shafts and pneumatic clutches for connecting or disconnecting shafts. Pneumatic brake and clutch assemblies transmit force from one point to another point using compressed air or other gases. Engaging the clutch transfers power from an engine to devices such as a transmission and drive wheels. Disengaging the clutch stops the power transfer, but allows the engine to continue turning. Braking slows or stops the movement of the coupled shafts. Because they provide reduced breaking distances, pneumatic brake and clutch assemblies are often used in large motorized vehicles such as buses.