A tool so perfect for self defense it's even used by the biggest police forces from around the globe. These batons feature a spring design that whips the metal strike area giving it more power with less effort. A flick of the wrist causes a whipping effect which builds momentum and gives you a lot of striking power. The unit retracts with a simple twist. It measures 18" when fully extended and 7 1/2" when retracted. Comes with a Nylon Case in a back pocket or glove compartment.