Smith & Wesson SWPENBK 5.7in Aircraft Aluminum Refillable Tactical Screw Cap Pen for Outdoor Survival Camping and Everyday Carry DIMENSIONS: 5.7 inch (14.5 cm) overall length and a weight of 1.4 ounces DURABLE: Pen is made of reliable T6061 Aircraft Aluminum DEPENDABLE: Quick and easy access with the convenient pocket clip and screw-off top SECURE: Have confidence that this tool will perform when needed for self-defense and blend in when not in use BE PREPARED: Pen can be refilled with Schmidt P900M Parker Style Black Ball Point Cartridges