UZI Defender Tactical Pen Nickel UZITP4GM. This Tactical Pen from the devoted experts at UZI measures 5 3/4" overall with a black aircraft aluminum construction and accepts Fisher Space pen refills. Don't do anything until you have the superb UZI Defender Tactical Pen from UZI. Specifications for UZI Defender Tactical Pen: Manufacturer: UZI Fabric/Material: Aluminum Overall Length: 5.75 in Blade Material: Steel Closed Length: 5.875 in Package Contents: UZI Defender Tactical Pen UZI UZITP4GM: Defender Tactical Pen Nickel