Is the pen mightier than the sword? United's Defense Pen is both a writing and self defense tool. The solid cap-less design gives it the strength it needs to double as a kubotan. Artfully machined out of 6061 hard anodized aluminum, the pen features fluting and grooves to give the wielder a secure grip when writing or during self defense. A strong clip attached to the pen keeps it secured right where you need it. Pen measures 5.375" overall.