The Smith & Wesson Military Tactical Pen is 5.8 inches in length. It's made up of T60061 Aircraft Aluminum. Each pen includes one Schmidt P900M Parker Style Black Ball Point Ink Cartridge. It has a screw cap with a pocket clip for easy carry and is designed for recreational and professional levels of use. CNC Machined Black T6061 Aircraft Aluminum, Screw Cap with Pocket Clip Includes One Schmidt P900M Parker Style Black Ball Point Ink Cartridge Overall Length 5.8 inch (14.7 cm) Weight 0.06 pounds Matte black finish Recreational and professional level use