Zhaoyun Multi Aircraft Aluminum Tactical Self Defense Pen with Glass Breaker,DNA Catcher,Precision Writing With a built in Glass Window Breaker designed for Automobile windows in emergencies , This product could save your life!! Perfect Birthday gift, Christmas gift, Strong and Durable, Made from Aviation Grade Aluminum this cool product could last a lifetime.!! Perfect gift for men and wemon.. All Security Industry Professionals, Military, Police, security Guards. etc Writes beautifully and is still practical for daily use weighing only 41 grams at 5.7 inches in length.. this product fits in your front shirt pocket nicely. With a click on lid this item is designed to stay in your hand under Stressful conditions, Perfect self Defence tool, Black Ink 0.5 Ballpoint Easy Refill conveniently sold at any stationary office supply store running out of ink is no problem , This pen also comes with a 300D density Nylon pouch. please see images above.