The Mad Man Tactical Spring Pen will increase your chances of survival should the situation arise. Featuring a smooth writing pen tip for daily use on one end and a glass breaking crown with a sharp point to be used for self defense or to break glass on the other, the key chain design provides easy accessibility making this both a practical and tactical gadget to carry. WARNING: This product contains chemicals known to the State of California to cause cancer and/or reproductive harm. For details, visit www.P65Warnings.ca.gov/product