It is a pneumatic (air-powered) tool designed for high-speed fastening in tight spaces where a standard pistol-grip wrench might not fit. Rodac International. Butterfly Throttle: The flat paddle on top is a rocker-style trigger.
This vintage Rodac 3/8" drive butterfly pneumatic impact wrench would be ideal for small engine repair workshops or even individual DIY enthusiasts, providing the perfect tool for tightening nuts, bolts, and other hardware.