A quick change adapter for removeably mounting a finishing tool to a rotary drive shaft. The quick change adapter includes a shaft hub mount designed to be mounted to a rotary drive shaft, and a tool hub mount designed to hold a finishing tool and to be removably secured to the shaft hub mount. The shaft hub mount includes a shaft sleeve with an annular sleeve ring on it. An annular locking ring is biased against the sleeve ring and includes a locking tab that slides into a locking slot in the sleeve ring. The tool adapter includes a lock sleeve adapted to slide between the annular locking ring and the shaft sleeve. The lock sleeve has a locking finger this slides into a recess slot in the locking slot when the tool adapter mount is engaged with the shaft hub mount.