The size of the tools is 54 * 50 * 8mm (2.13 x 1.97 x 0.31 inches), the net weight is 60g. This small tools is the trusted choice for self defense, This self-defense tool is made of brass and exquisitely carved. It is an indispensable decoration on your key chain, and it is also a self-defense tool for men or women. It can also be used as a window breaker, which can easily break the glass to escape.