AutoLock® Expandable Black Chrome Baton MODEL: 9146 SKU: PART: The AutoLock was developed through cutting-edge engineering that combined the advantages of friction lock and positive lock technology. The technologically advanced, patented AutoLock baton is ready at hand when you need it and out of the way when you don't. It's easy to expand, and when it's time to close, simply push the button in the end cap. No need to look for a hard surface to collapse the baton.