Uzi TachPen6 $19.95 Lightweight aircraft aluminum. Glass-breaker crown that can also be used to strike an assailant in self defense. Also features a handcuff key. This pen is a dependable self defense weapon that can be carried around anywhere such as your shirt pocket, glove compartment, purse or backpack. To use the pen, simply twist the end to write. Comes with a sturdy, over sized pocket clip. Includes a standard Parker BLACK INK cartridge and accepts Fisher Space pen refills.