Meet the Night Watchman Thumper: another tool that helps law enforcement agents handle tough situations. It is a solid piece of polypropylene with a handle that gives you a strong grip. A paracord wrist lanyard is attached to the device to keep you in control.
The Thumper has a glass-breaker on the pommel. It is available for under $20 at this time. Just make sure your state allows you to own such a tool.