“The pen is mightier than the sword” This is true of Voodoo Tactical’s line of writing/defensive pens. They are made for the double duty of writing the grocery list and as a last ditch self defense tool. Our CNC machined aircraft aluminum pens have replaceable black ink cartridges (#07-3330) and are designed to take whatever abuse you throw at them. The Viper with its DNA catcher sharpened crown, stainless steel pocket clip and knurled handle can be a huge deterrent to any aggressor. Makes an ideal gift at graduation or when that special someone is promoted. Overall Measures 6.5″. Weighs .15 lbs. Available in three colors.