The Aluminum Bolt Action Tactical Pen CID CAL 45 Gen 2 makes for a great defense tool. Measures 2.5 inches overall making it an easy pen to take on the go and be used every day. This pen is constructed with a black anodized aluminum construction to give it a slick tactical look. This military-inspired designed pen would be a great gift to a veteran to have at their workstation. Doesn’t get much better when talking pens than the Aluminum Bolt Action Tactical Pen CID CAL 45 Gen 2.