Pros: Materials, Durability, Refill Quality
Love this pen. I wear it on the out side of my pocket and the clip is strong so it never comes lose. I just unscrew it and leave the cap cliped to my pocket and then screw it back on when I'm done. However, the bad, if you tighten the pen to hard, as its a screw-on cap you'll find yourself unscrewing the whole pen like if you were going to change the ink cartridge. Also the glass breaker tip came lose on mine and I almost lost it but its nothing a little super glue cant fix so no big dead. Its also a stylus pen but I find it impractical as only the side with the glass breaker works. You'll find yourself scratching the crap out of your phone/tablet. But if you can look past all that its a cool self defense/writing tool.